Lesson 1 : Trimming The Helicopter
Here's the difficult part. Getting the heli properly trimmed. A heli which is trimmed means that during a hover, all the control trims on the Tx are at center position. This is ideal, but this is not always the case.
To begin, make sure that your servos center point is neutral with the control surfaces. ie: With your swashplate level, your aileron and elevator servos should be at center position, with the control sticks also at center position. Rudder is difficult, so follow your instruction manual on pre-setting the rudder. Only during your first hover would you know how much rudder trimming you need.
Setup your gyro, and pay careful attention to the way your gyro moves in conjunction with the way you swing the heli. You would want the gyro to counter your movement.
Set up your throttle and pitch curve the way you want it. How I normally set mine (using a Futaba) is to set the throttle first, then the pitch.
With the Throttle stick at 50% Center, open up the throttle lever on your engine to 50% (approx), and then fit the horn into the servo gear. Next, push the throttle trim to minimum, and the throttle stick to minimum as well. Your throttle should be fully closed. Make sure the linkages do not buckle. If your throttle is not at the fully closed position, there should be a pot (or computer) setting to adjust the Low end travel. Adjust this until the throttle fully closes without buckling the linkages.
Now push throttle stick to high position, and the throttle should fully open. As before, if the throttle is not fully opened or the linkage is buckling, then adjust the throttle pots (or computer) for the high end travel.
This setting should make your throttle quite linear. Re-adjust later if you find your head speed to be off.
For the pitch setting, set your throttle stick to the center position, and with a pitch gauge, set the pitch for hovering (5 to 6 degrees), and mount the linkage to the servo gear. Push the throttle to the fully low position, and then check the pitch. Adjust your pot (or computer) to give you the pitch you want. If you are unable to attain the pitch you desire, use a longer servo horn. Do the same for the high side. Normally, for starters, -1 to 10 degrees is ideal.
Therefore, we can summarize it as follows:
STICK POSITION
THROTTLE
PITCH
Low Position
0% (trim at min)
-1 degree
Middle Position
50%
5 degrees
High Position
100%
10 degrees
Lastly, CENTER OF GRAVITY (CG) has to be right in the middle of the rotor mast! If it's not, use weights to adjust the position till it's there.
Once you have completed the preliminary setup, it's time to fuel up and trim up the entire heli.
Rev up the throttle, and wait until you get a good constant sound from the engine. Then increase the throttle slowly until the heli is very light on its feet. At this stage, your heli will start to move in all directions. Counter the heli movements by controlling your cyclic and rudder. For the first timers, this may be impossible, so get someone to help if necessary. Also, put the training gears on to save $$$$ in case anything happens. Trying to be macho here won't gain points :)
Natural movements of the heli will be as such.
For a clockwise turning rotor, your heli will tend to drift to the left, due to the tail rotor pushing to counter the torque. This is normal, and I normally just push my aileron trim 2 to 3 clicks right.
Pushing the aileron right to counter will cause the tail to rise, because of the slight angle, and this is countered by a little back elevator.
During the hover, your tail should be rock steady
On increasing throttle, your heli (head) will swing left, but the gyro should counter it slightly, and on decreasing throttle, the heli will swing right
If your heli behaves in this manner, then you got a properly trimmed heli.
If the tail drops during lift off, your CG is too far back. Use a heavier battery or some weight to counter it. Same goes for the opposite. But if the CG is correct, check the swashplate. It might not be level.
If your heli drops severely left or right, the swashplate is probably not level. Check direction, and readjust.
Tail swings left (head right) during hover. Rudder linkages too much positive degree. Adjust the linkage to reduce the rudder pitch.
Tail swings right (head left) during hover. Rudder linkages too little degree. Adjust the linkage to increase the rudder pitch.
Tail starts to wag. Your gyro gain is too high. Reduce.
Note: If your heli is a counter-clockwise rotation rotor, then the effects will all be opposite of the above.
2007年8月28日星期二
15 min Helicopter Pleasure Flight
A once in a lifetime experience - an exhilarating flight in a modern helicopter. This gift voucher is open dated .
What's included
Nothing else comes close to touching the magic of vertical flight; from the moment you lift into the air to the second the helicopter settles gracefully back on the ground it is a truly exciting and unforgettable experience. You will be welcomed and briefed by one of our specialist team and given the opportunity to see and hear our modern helicopter at close quarters. Then it's your turn; climbing gracefully to over 1,000 feet and accelerating to over 120 miles an hour, you will interact with the pilot via the headset (don't forget to listen out for air traffic on the radio!), swooping over the landscape and then settling gently back on the ground. Cameras are positively encouraged - with an experience this exhilarating you will want to relive it as often as possible!
Voucher
Each voucher entitles one person to participate in this experience. The voucher is transferable, which means that anyone can use it. The voucher remains valid for bookings for 6 months from the date of purchase. Please contact the operator using the details printed on your voucher to arrange a date for your event.
Special Conditions
We recommend that you wear long sleeves and trousers and should avoid wearing a hat (helicopter downwash can be quite exciting!) The pilot can control the internal temperature of the helicopter, although it can become quite warm on sunny days. The helicopters carry between 3 and 6 people, so there will be other passengers on board.
Booking your event
We recommend that you purchase your voucher and make a booking for your event at least one month prior to your chosen date. This is particularly important for weekend events.
What's included
Nothing else comes close to touching the magic of vertical flight; from the moment you lift into the air to the second the helicopter settles gracefully back on the ground it is a truly exciting and unforgettable experience. You will be welcomed and briefed by one of our specialist team and given the opportunity to see and hear our modern helicopter at close quarters. Then it's your turn; climbing gracefully to over 1,000 feet and accelerating to over 120 miles an hour, you will interact with the pilot via the headset (don't forget to listen out for air traffic on the radio!), swooping over the landscape and then settling gently back on the ground. Cameras are positively encouraged - with an experience this exhilarating you will want to relive it as often as possible!
Voucher
Each voucher entitles one person to participate in this experience. The voucher is transferable, which means that anyone can use it. The voucher remains valid for bookings for 6 months from the date of purchase. Please contact the operator using the details printed on your voucher to arrange a date for your event.
Special Conditions
We recommend that you wear long sleeves and trousers and should avoid wearing a hat (helicopter downwash can be quite exciting!) The pilot can control the internal temperature of the helicopter, although it can become quite warm on sunny days. The helicopters carry between 3 and 6 people, so there will be other passengers on board.
Booking your event
We recommend that you purchase your voucher and make a booking for your event at least one month prior to your chosen date. This is particularly important for weekend events.
2007年8月17日星期五
Here is a few ways to keep your cell phone's battery running as long as possible
Here is a few ways to keep your cell phone's battery running as long as possible.
Is your cell phone battery losing power constantly? Have you ever had to stop using your cell phone in the middle of a call because the battery died? Here are a few tips you can use to conserve your cell phone battery's power:1. Turn off the backlight. While this may make it harder to use your cell phone at nighttime or in pitch-black situations, most of the time you can easily use your cell phone without it being brightly lit. If you must, change your cell phone's backlight settings so the light goes off after 5 or 10 seconds of inactivity. This way your phone should still be usable at nighttime. 2. If you know you're traveling to an area without coverage or with only roaming coverage, consider turning off your cell phone. It can use up a lot of power trying to find a suitable network. 3. The less you talk, the less battery power your cell phone will use. Try to limit your conversations until you can get to your home phone. 4. Limit your usage of non-voice features such as web browsing and playing cell-phone games. If you have a picture cell phone, realize that taking pictures can eat up battery power, especially if you have flash turned on.
Is your cell phone battery losing power constantly? Have you ever had to stop using your cell phone in the middle of a call because the battery died? Here are a few tips you can use to conserve your cell phone battery's power:1. Turn off the backlight. While this may make it harder to use your cell phone at nighttime or in pitch-black situations, most of the time you can easily use your cell phone without it being brightly lit. If you must, change your cell phone's backlight settings so the light goes off after 5 or 10 seconds of inactivity. This way your phone should still be usable at nighttime. 2. If you know you're traveling to an area without coverage or with only roaming coverage, consider turning off your cell phone. It can use up a lot of power trying to find a suitable network. 3. The less you talk, the less battery power your cell phone will use. Try to limit your conversations until you can get to your home phone. 4. Limit your usage of non-voice features such as web browsing and playing cell-phone games. If you have a picture cell phone, realize that taking pictures can eat up battery power, especially if you have flash turned on.
Christmas Lights
Give yourself a break for next year and take the time to store lights in a way that they will not become a tangled mess. Wrap them up individually and either tie them with bread ties or place each one in a plastic grocery store bag. It's best if you can do both. ~ 1powershop
Purchase one or two strands of lights at the after Christmas sales. This will give you replacements for next year, and save some money. ~ 1powershop
Purchase one or two strands of lights at the after Christmas sales. This will give you replacements for next year, and save some money. ~ 1powershop
2007年8月13日星期一
What is Bluetooth?
Bluetoothis the name for a short-range radio frequency (RF) technology that operates at 2.4 GHz and is capable of transmitting voice and data. The effective range of Bluetooth devices is 30 feet (10 meters). Bluetooth transfers data at the rate of 1 Mbps, which is from three to eight times the average speed of parallel and serial ports, respectively.~~~1powershop.com
Is Bluetooth practical for use with mobile devices
Yes. One concern for mobile computing users is power consumption. Bluetooth radios are very low power, drawing as little as 0.3mA in standby mode and 30mA during sustained data transmissions. Bluetooth radios alternate among power-saving modes in which device activity is lowered to maximize the mobile power supply. That is why we have Bluetooth Headse~~~~~~~~1powreshop.com
Cell Phone Battery Safety
THERE are more than 230 million cell phone users in the United States today. To promote the safe use of cell phones, batteries and chargers, the Portable Rechargeable Battery Association (PRBA) endorses the following recommendations made by the U.S. Consumer Product Safety Commission (CPSC) and CTIA-The Wireless Association, the trade organization representing various facets of the wireless industry:
1. Do not use incompatible cell phone batteries and chargers. Some Web sites and second-hand dealers, not associated with reputable manufacturers and carriers, might be selling incompatible or even counterfeit batteries and chargers. Consumers should purchase manufacturer- or carrier-recommended products and accessories. If unsure about whether a replacement battery or charger is compatible, contact the manufacturer of the battery or charger.
2. Do not permit a battery outside the phone to come in contact with metal objects. These would include objects such as coins, keys and jewelry.
3. Do not crush, puncture or put a high degree of pressure on the battery. This can cause an internal short-circuit, resulting in overheating.
4. Avoid dropping the cell phone. Dropping it, especially on a hard surface, can potentially cause damage to the phone and battery. If you suspect damage to the phone or battery, take it to a service center for inspection.
5. Do not place the phone in areas that may get very hot. This would include on or near a cooking surface, cooking appliance, iron or radiator.
6. Do not get your phone or battery wet. Even though they will dry and appear to operate normally, the circuitry could slowly corrode and pose a safety hazard.
7. Follow battery usage, storage and charging guidelines found in the user's guide.
1. Do not use incompatible cell phone batteries and chargers. Some Web sites and second-hand dealers, not associated with reputable manufacturers and carriers, might be selling incompatible or even counterfeit batteries and chargers. Consumers should purchase manufacturer- or carrier-recommended products and accessories. If unsure about whether a replacement battery or charger is compatible, contact the manufacturer of the battery or charger.
2. Do not permit a battery outside the phone to come in contact with metal objects. These would include objects such as coins, keys and jewelry.
3. Do not crush, puncture or put a high degree of pressure on the battery. This can cause an internal short-circuit, resulting in overheating.
4. Avoid dropping the cell phone. Dropping it, especially on a hard surface, can potentially cause damage to the phone and battery. If you suspect damage to the phone or battery, take it to a service center for inspection.
5. Do not place the phone in areas that may get very hot. This would include on or near a cooking surface, cooking appliance, iron or radiator.
6. Do not get your phone or battery wet. Even though they will dry and appear to operate normally, the circuitry could slowly corrode and pose a safety hazard.
7. Follow battery usage, storage and charging guidelines found in the user's guide.
Here is a few ways to keep your cell phone's battery running as long as possible.
Is your cell phone battery losing power constantly? Have you ever had to stop using your cell phone in the middle of a call because the battery died? Here are a few tips you can use to conserve your cell phone battery's power:
1. Turn off the backlight. While this may make it harder to use your cell phone at nighttime or in pitch-black situations, most of the time you can easily use your cell phone without it being brightly lit. If you must, change your cell phone's backlight settings so the light goes off after 5 or 10 seconds of inactivity. This way your phone should still be usable at nighttime.
2. If you know you're traveling to an area without coverage or with only roaming coverage, consider turning off your cell phone. It can use up a lot of power trying to find a suitable network.
3. The less you talk, the less battery power your cell phone will use. Try to limit your conversations until you can get to your home phone.
4. Limit your usage of non-voice features such as web browsing and playing cell-phone games. If you have a picture cell phone, realize that taking pictures can eat up battery power, especially if you have flash turned on.
1. Turn off the backlight. While this may make it harder to use your cell phone at nighttime or in pitch-black situations, most of the time you can easily use your cell phone without it being brightly lit. If you must, change your cell phone's backlight settings so the light goes off after 5 or 10 seconds of inactivity. This way your phone should still be usable at nighttime.
2. If you know you're traveling to an area without coverage or with only roaming coverage, consider turning off your cell phone. It can use up a lot of power trying to find a suitable network.
3. The less you talk, the less battery power your cell phone will use. Try to limit your conversations until you can get to your home phone.
4. Limit your usage of non-voice features such as web browsing and playing cell-phone games. If you have a picture cell phone, realize that taking pictures can eat up battery power, especially if you have flash turned on.
2007年8月9日星期四
Exercise Your
Battery
To increase the life of your batteries, don’t leave them dormant for extended periods of time. Even if you use AC power most of the time, use the battery periodically to keep it fresh and healthy. Unplug your AC adapter when the phone, computer, etc. is not in use.
BatteryStorage
Store batteries in a cool, dry place away from heat and metal objects. Batteries left idle for extended periods of time will self-discharge. Just remember to charge them before use.
BatteryReplacement
If your battery used to last 8 hours and now only lasts 2 hours, it could be memory effort or just time for a new battery. NiCad batteries last approximately 700 charge/discharge cycles, or about one and a half years on average. However, NiMh batteries will normally last for only approximately 400 charge/discharge cycles.
Recycle Dead Batteries
Please be kind to the environment and not throw your batteries in the trash. The environmental protection agency (EPA) estimates that 200 tons of cadmium and 260,000 tonnes of lead enter the waste stream annually. Please send your old batteries to EarthVision for safe recycling (address to "Recycling Dept.) or use one of these organizations:
Battery
To increase the life of your batteries, don’t leave them dormant for extended periods of time. Even if you use AC power most of the time, use the battery periodically to keep it fresh and healthy. Unplug your AC adapter when the phone, computer, etc. is not in use.
BatteryStorage
Store batteries in a cool, dry place away from heat and metal objects. Batteries left idle for extended periods of time will self-discharge. Just remember to charge them before use.
BatteryReplacement
If your battery used to last 8 hours and now only lasts 2 hours, it could be memory effort or just time for a new battery. NiCad batteries last approximately 700 charge/discharge cycles, or about one and a half years on average. However, NiMh batteries will normally last for only approximately 400 charge/discharge cycles.
Recycle Dead Batteries
Please be kind to the environment and not throw your batteries in the trash. The environmental protection agency (EPA) estimates that 200 tons of cadmium and 260,000 tonnes of lead enter the waste stream annually. Please send your old batteries to EarthVision for safe recycling (address to "Recycling Dept.) or use one of these organizations:
The Battery Doctor ~~1powershop.com
Break In New Batteries
New batteries come in an uncharged condition. To break in a new battery, we suggest charging and then discharging the battery 2 to 4 times so they can reach their full, rated capacity. You can discharge most batteries by unplugging the AC adapter and leaving them turned on until completely discharged. Some phones have a desktop charger/conditioner which will speed up the process.
Charging Your Battery
Never charge your battery for more than 14 hours. If you are using a Nickel-Metal Hydride (NiMh) or Lithium-Ion (Li-Ion) battery, your charging time should be less than 14 hours. Manufacturers’ manuals normally state not to charge a battery for more than 24 hours, but if you leave it on the charger for more than 14 hours you risk damaging the battery by overcharging.
Eliminate Memory Effects
Nickel-Cadmium (NiCad) batteries suffer from an affliction known as the memory effect. The battery will only charge to the level of which the battery was last discharged due to an accumulation of gas bubbles on the cell plates. If a battery is discharged to 30% and then recharged, the battery will only charge to 30% of its capacity and thus shrinking the battery’s "gas tank."
Burp Your Battery
The best way to eliminate memory and remove the accumulated gas bubbles on the cell plates is to "burp", or condition it. This means draining the battery until your portable phone shuts off, and then recharging it. Again, the desktop charger/conditioner will speed up this process
New batteries come in an uncharged condition. To break in a new battery, we suggest charging and then discharging the battery 2 to 4 times so they can reach their full, rated capacity. You can discharge most batteries by unplugging the AC adapter and leaving them turned on until completely discharged. Some phones have a desktop charger/conditioner which will speed up the process.
Charging Your Battery
Never charge your battery for more than 14 hours. If you are using a Nickel-Metal Hydride (NiMh) or Lithium-Ion (Li-Ion) battery, your charging time should be less than 14 hours. Manufacturers’ manuals normally state not to charge a battery for more than 24 hours, but if you leave it on the charger for more than 14 hours you risk damaging the battery by overcharging.
Eliminate Memory Effects
Nickel-Cadmium (NiCad) batteries suffer from an affliction known as the memory effect. The battery will only charge to the level of which the battery was last discharged due to an accumulation of gas bubbles on the cell plates. If a battery is discharged to 30% and then recharged, the battery will only charge to 30% of its capacity and thus shrinking the battery’s "gas tank."
Burp Your Battery
The best way to eliminate memory and remove the accumulated gas bubbles on the cell plates is to "burp", or condition it. This means draining the battery until your portable phone shuts off, and then recharging it. Again, the desktop charger/conditioner will speed up this process
Battery Charger Tips (1powershop)
Battery Charger Tips
Tip 1: The wires coming out of the charger should be long enough to reach the transformer (brick) and still allow the charger board to rest on a flat surface.
Tip 2: You might want to use some heat shrink (available in the lab) or tape to combine the wires coming out the board. This will help prevent them from tangling.
Tip 3: The charger board has an exposed metal back!
Tip 4: The wires from the charger board connect to the MIDDLE two scews on the transformer. Do NOT over tighten the screws or they might break!
· Once charging is complete, remove Mobile-charger from device and disconnect the cable from the Mobile-Charger
· Do not leave cable connected to Mobile-Charger when not in use
· 1 - 2 chargings are typical from one alkaline AA battery and device
Tip 1: The wires coming out of the charger should be long enough to reach the transformer (brick) and still allow the charger board to rest on a flat surface.
Tip 2: You might want to use some heat shrink (available in the lab) or tape to combine the wires coming out the board. This will help prevent them from tangling.
Tip 3: The charger board has an exposed metal back!
Tip 4: The wires from the charger board connect to the MIDDLE two scews on the transformer. Do NOT over tighten the screws or they might break!
· Once charging is complete, remove Mobile-charger from device and disconnect the cable from the Mobile-Charger
· Do not leave cable connected to Mobile-Charger when not in use
· 1 - 2 chargings are typical from one alkaline AA battery and device
2007年8月8日星期三
General Answers for bluetooth from 1powershop.com (4)
Q: Is Bluetooth practical for use with mobile devices?A: Yes. One concern for mobile computing users is power consumption. Bluetooth radios are very low power, drawing as little as 0.3mA in standby mode and 30mA during sustained data transmissions. Bluetooth radios alternate among power-saving modes in which device activity is lowered to maximize the mobile power supply.
<1powershop>
Q: What is a Personal Area Network (PAN)?A: A Personal Area Network is another name for a Bluetooth Piconet.
<1powershop>
Q: What is HomeRF ? A: HomeRFlike Bluetooth is a specification for connectivity and mobility in a home-like environment. HomeRF Working Group has developed a specification for wireless communications in the home called the Shared Wireless Access Protocol (SWAP).
<1powershop>
Regulatory/ Market Answers:Q: Are different brands of Bluetooth products compatible?A: Yes. They have to. The Bluetooth Logo Certification Program requires Bluetooth products to interoperate with products manufactured by other vendors; those products that don't interoperate will not be allowed to use the Bluetooth logo.
<1powershop>
Q: Can Bluetooth products be used on aircraft?A: The Federal Aviation Administration (FAA) and other aviation regulatory bodies worldwide are currently reviewing the use of Bluetooth products on private and commercial aircraft. In the U.S. the FAA is the governing body to grant approval for Bluetooth product use on aircraft; therefore, we must defer to their impending ruling.
<1powershop>
Q: What companies are involved in the Bluetooth initiative?A: Global technology leaders Ericsson, Nokia, IBM, Intel and Toshiba founded the Bluetooth SIG in 1998. These companies are now supported by over 1,000 other organizations with a wide range of expertise, including Widcomm, Inc.
<1powershop>
Q: What types of companies are likely to adopt or promote Bluetooth technology?A: Companies likely to adopt this technology include, but are not limited to, software developers, network vendors, silicon vendors, peripheral and camera manufacturers, mobile PC and handheld device manufacturers, consumer electronics manufacturers and more.
<1powershop>
Q: Are there any patents or licenses involved?A: Yes, there are several patents on different parts of the technology. Because of this, all licensees will have to sign a zero cost license agreement to cover IP and naming.
<1powershop>
Q: What is the estimated size of the market?A: Market research studies at several leading companies involved with Bluetooth technology expect a total of 250 million Bluetooth-enabled devices, ranging from headsets to mobile and desk1powershop computers, will be shipped in 2002.
<1powershop>
Q: Where can I get Bluetooth specification ? Is it license free ? A: Bluetooth specification can be downloaded from Bluetooth.com which has more comprehensive information about Bluetooth.com and its SIG. It is totally free and no license is required to use it.
<1powershop>
Q: Is Bluetooth an IEEE standard, like IEEE 802.11 and Ethernet?A: Being an IEEE standard will be a big plus to widespread adoption of Bluetooth, and IEEE 802.15 working group for personal area networks (PAN) announced that they will be adopting Bluetooth as the IEEE 802.15 standard.
<1powershop>
Q: How much will Bluetooth devices cost? A: Bluetooth devices are expected to cost $20 initially (first half of 2000); but will drop to around $5 with widespread adoption and economies of scale.
<1powershop>
Q: What is it - a technology, a standard, an initiative, or a product? A: Bluetooth wireless technology is a de facto standard, as well as a specification for small-form factor, low-cost, short range radio links between mobile PCs, mobile phones and other portable devices. The Bluetooth Special Interest Group is an industry group consisting of leaders in the telecommunications, computing, and networking industries that are driving development of the technology and bringing it to market.
<1powershop>
Q: What is a Personal Area Network (PAN)?A: A Personal Area Network is another name for a Bluetooth Piconet.
<1powershop>
Q: What is HomeRF ? A: HomeRFlike Bluetooth is a specification for connectivity and mobility in a home-like environment. HomeRF Working Group has developed a specification for wireless communications in the home called the Shared Wireless Access Protocol (SWAP).
<1powershop>
Regulatory/ Market Answers:Q: Are different brands of Bluetooth products compatible?A: Yes. They have to. The Bluetooth Logo Certification Program requires Bluetooth products to interoperate with products manufactured by other vendors; those products that don't interoperate will not be allowed to use the Bluetooth logo.
<1powershop>
Q: Can Bluetooth products be used on aircraft?A: The Federal Aviation Administration (FAA) and other aviation regulatory bodies worldwide are currently reviewing the use of Bluetooth products on private and commercial aircraft. In the U.S. the FAA is the governing body to grant approval for Bluetooth product use on aircraft; therefore, we must defer to their impending ruling.
<1powershop>
Q: What companies are involved in the Bluetooth initiative?A: Global technology leaders Ericsson, Nokia, IBM, Intel and Toshiba founded the Bluetooth SIG in 1998. These companies are now supported by over 1,000 other organizations with a wide range of expertise, including Widcomm, Inc.
<1powershop>
Q: What types of companies are likely to adopt or promote Bluetooth technology?A: Companies likely to adopt this technology include, but are not limited to, software developers, network vendors, silicon vendors, peripheral and camera manufacturers, mobile PC and handheld device manufacturers, consumer electronics manufacturers and more.
<1powershop>
Q: Are there any patents or licenses involved?A: Yes, there are several patents on different parts of the technology. Because of this, all licensees will have to sign a zero cost license agreement to cover IP and naming.
<1powershop>
Q: What is the estimated size of the market?A: Market research studies at several leading companies involved with Bluetooth technology expect a total of 250 million Bluetooth-enabled devices, ranging from headsets to mobile and desk1powershop computers, will be shipped in 2002.
<1powershop>
Q: Where can I get Bluetooth specification ? Is it license free ? A: Bluetooth specification can be downloaded from Bluetooth.com which has more comprehensive information about Bluetooth.com and its SIG. It is totally free and no license is required to use it.
<1powershop>
Q: Is Bluetooth an IEEE standard, like IEEE 802.11 and Ethernet?A: Being an IEEE standard will be a big plus to widespread adoption of Bluetooth, and IEEE 802.15 working group for personal area networks (PAN) announced that they will be adopting Bluetooth as the IEEE 802.15 standard.
<1powershop>
Q: How much will Bluetooth devices cost? A: Bluetooth devices are expected to cost $20 initially (first half of 2000); but will drop to around $5 with widespread adoption and economies of scale.
<1powershop>
Q: What is it - a technology, a standard, an initiative, or a product? A: Bluetooth wireless technology is a de facto standard, as well as a specification for small-form factor, low-cost, short range radio links between mobile PCs, mobile phones and other portable devices. The Bluetooth Special Interest Group is an industry group consisting of leaders in the telecommunications, computing, and networking industries that are driving development of the technology and bringing it to market.
General Answers for bluetooth from 1powrshop (3)
Q: What is Frequency-Hopping Spread Spectrum (FHSS)?A: Frequency-Hopping Spread-Spectrum (FHSS) is a spread spectrum modulation scheme that uses a narrowband carrier that changes frequency in a pattern known to both transmitter and receiver. Properly synchronized, they maintain a single logical channel. To an unintended receiver, FHSS appears as short-duration impulse noise. More simply, the data is broken down into packets and transmitted to the receiver of other devices over numerous "hop frequencies" (79 total) in a pseudo random pattern. Only transmitters and receivers that are synchronized on the same hop frequency pattern will have access to the transmitted data. The transmitter switches hop frequencies 1,600 times per second to assure a high degree of data security.
<1powershop>
Q: Will other RF (Radio Frequency) devices interfere with Bluetooth Devices?A: No. Bluetooth radios operate on the unlicensed 2.4 GHz (Industrial, Scientific and Medical) frequency band that is shared among other devices (microwave ovens, cordless phones, garage door openers, etc. ). Bluetooth radios switch frequencies at such a rapid pace (1,600 times per second) and the data packets are so small that interference from other RF sources is highly unlikely. Bluetooth is a robust communication system.
<1powershop>
Q: Will Bluetooth and Wireless LAN (WLAN) interfere with each other?A: No, both Bluetooth and WLAN can co-exist. Since Bluetooth devices use Frequency Hopping and most WLANs use Direct Sequence Spreading techniques they each appear as background noise to the other and should not cause any perceivable performance issues.
<1powershop>
Q: What is the data throughput speed of a Bluetooth connection?A: Bluetooth transfers data at a rate of 721 Kbps, which is from three to eight times the average speed of parallel and serial ports, respectively. This bandwidth is capable of transmitting voice, data, video and still images.
<1powershop>
Q: What is the range of Bluetooth transmitter/receivers? A: Bluetooth is designed for very low power use, and the transmission range will only be 10m, about 30ft. High-powered Bluetooth devices will enable ranges up to 100m (300ft). Considering the design philosophy behind Bluetooth, even the 10m range is adequate for the purposes Bluetooth is intended for. Later versions of the Bluetooth spec may allow longer ranges.
<1powershop>
Q: What kind of encryption will be used for Bluetooth security?A: The Bluetooth specification 1.0 describes the link encryption algorithm as a stream cipher using 4 LFSR (linear feedback shift registers). The sum of the width of the LFSRs is 128, and the spec says "the effective key length is selectable between 8 and 128 bits". This arrangement allows Bluetooth to be used in countries with regulations limiting encryption strength, and "facilitate a future upgrade path for the security without the need for a costly redesign of the algorithms and encryption hardware" according to the Bluetooth specification. Key generation and authentication seems to be using the 8-round SAFER+ encryption algorithm. The information available suggests that Bluetooth security will be adequate for most purposes; but users with higher security requirements will need to employ stronger algorithms to ensure the security of their data.
<1powershop>
<1powershop>
Q: Will other RF (Radio Frequency) devices interfere with Bluetooth Devices?A: No. Bluetooth radios operate on the unlicensed 2.4 GHz (Industrial, Scientific and Medical) frequency band that is shared among other devices (microwave ovens, cordless phones, garage door openers, etc. ). Bluetooth radios switch frequencies at such a rapid pace (1,600 times per second) and the data packets are so small that interference from other RF sources is highly unlikely. Bluetooth is a robust communication system.
<1powershop>
Q: Will Bluetooth and Wireless LAN (WLAN) interfere with each other?A: No, both Bluetooth and WLAN can co-exist. Since Bluetooth devices use Frequency Hopping and most WLANs use Direct Sequence Spreading techniques they each appear as background noise to the other and should not cause any perceivable performance issues.
<1powershop>
Q: What is the data throughput speed of a Bluetooth connection?A: Bluetooth transfers data at a rate of 721 Kbps, which is from three to eight times the average speed of parallel and serial ports, respectively. This bandwidth is capable of transmitting voice, data, video and still images.
<1powershop>
Q: What is the range of Bluetooth transmitter/receivers? A: Bluetooth is designed for very low power use, and the transmission range will only be 10m, about 30ft. High-powered Bluetooth devices will enable ranges up to 100m (300ft). Considering the design philosophy behind Bluetooth, even the 10m range is adequate for the purposes Bluetooth is intended for. Later versions of the Bluetooth spec may allow longer ranges.
<1powershop>
Q: What kind of encryption will be used for Bluetooth security?A: The Bluetooth specification 1.0 describes the link encryption algorithm as a stream cipher using 4 LFSR (linear feedback shift registers). The sum of the width of the LFSRs is 128, and the spec says "the effective key length is selectable between 8 and 128 bits". This arrangement allows Bluetooth to be used in countries with regulations limiting encryption strength, and "facilitate a future upgrade path for the security without the need for a costly redesign of the algorithms and encryption hardware" according to the Bluetooth specification. Key generation and authentication seems to be using the 8-round SAFER+ encryption algorithm. The information available suggests that Bluetooth security will be adequate for most purposes; but users with higher security requirements will need to employ stronger algorithms to ensure the security of their data.
<1powershop>
General Answers for bluetooth from 1powrshop (2)
Q: What is the future direction of the Bluetooth standard?A: At this time, we anticipate the Bluetooth SIG to evolve the Bluetooth technology to provide greater bandwidth and distances, thus increasing the potential platforms and applications used in the emerging personal area networking marketplace
<1powershop>
Q: Where can I find more information on Bluetooth?A: The following web sites are useful Bluetooth resources: www.bluetooth.com, www.xircom.com, and www.ericsson.com/bluetooth.
<1powershop>
Technology Answers:
Q: How secure is a Bluetooth network?A: Bluetooth is extremely secure in that it employs several layers of data encryption and user authentication measures. Bluetooth devices use a combination of the Personal Identification Number (PIN) and a Bluetooth address to identify other Bluetooth devices. Data encryption (i.e., 128-bit) can be used to further enhance the degree of Bluetooth security. The transmission scheme (FHSS) provides another level of security in itself. Instead of transmitting over one frequency within the 2.4 GHz band, Bluetooth radios use a fast frequency-hopping spread spectrum (FHSS) technique, allowing only synchronized receivers to access the transmitted data.
<1powershop>
<1powershop>
Q: Where can I find more information on Bluetooth?A: The following web sites are useful Bluetooth resources: www.bluetooth.com, www.xircom.com, and www.ericsson.com/bluetooth.
<1powershop>
Technology Answers:
Q: How secure is a Bluetooth network?A: Bluetooth is extremely secure in that it employs several layers of data encryption and user authentication measures. Bluetooth devices use a combination of the Personal Identification Number (PIN) and a Bluetooth address to identify other Bluetooth devices. Data encryption (i.e., 128-bit) can be used to further enhance the degree of Bluetooth security. The transmission scheme (FHSS) provides another level of security in itself. Instead of transmitting over one frequency within the 2.4 GHz band, Bluetooth radios use a fast frequency-hopping spread spectrum (FHSS) technique, allowing only synchronized receivers to access the transmitted data.
<1powershop>
General Answers for bluetooth from 1powrshop (1)
Q: What is Bluetooth?A: Bluetooth is the name for a short-range radio frequency (RF) technology that operates at 2.4 GHz and is capable of transmitting voice and data. The effective range of Bluetooth devices is 32 feet (10 meters). Bluetooth transfers data at the rate of 1 Mbps, which is from three to eight times the average speed of parallel and serial ports, respectively.
<1powershop>
Q: Why is the technology called Bluetooth?A: The heart of the Bluetooth brand identity is the name, which refers to the Danish king Harald "Bluetooth" Blaatand who unified Denmark and Norway. In the beginning of the Bluetooth wireless technology era, Bluetooth was aimed at unifying the telecom and computing industries.
<1powershop>
Q: How is Bluetooth used?A: Bluetooth can be used to wirelessly synchronize and transfer data among devices. Bluetooth can be thought of as a cable replacement technology. Typical uses include automatically synchronizing contact and calendar information among desk1powershop, notebook and palm1powershop computers without connecting cables. Bluetooth can also be used to access a network or the Internet with a notebook computer by connecting wirelessly to a cellular phone.
<1powershop>
<1powershop>
Q: Why is the technology called Bluetooth?A: The heart of the Bluetooth brand identity is the name, which refers to the Danish king Harald "Bluetooth" Blaatand who unified Denmark and Norway. In the beginning of the Bluetooth wireless technology era, Bluetooth was aimed at unifying the telecom and computing industries.
<1powershop>
Q: How is Bluetooth used?A: Bluetooth can be used to wirelessly synchronize and transfer data among devices. Bluetooth can be thought of as a cable replacement technology. Typical uses include automatically synchronizing contact and calendar information among desk1powershop, notebook and palm1powershop computers without connecting cables. Bluetooth can also be used to access a network or the Internet with a notebook computer by connecting wirelessly to a cellular phone.
<1powershop>
2007年8月7日星期二
headphone tips from www.1powershop.com
This month's tips will help you get the most from your headphones. We'll feature a different product in future issues to help you enjoy all the benefits it has to offer.
We hope you already know your Bose headphones are ideal for enjoying audio from at-home and portable electronic devices. But if your headphones have been hiding in a drawer or briefcase, or you're always using them the same way, here are a few new approaches.
From music to movies, Bose headphones let you enjoy clear, distinct audio from a variety of audio sources. Listen to your favorite CDs, radio stations or audio books. We suggest listening while studying, working, exercising or on your lunch break. They're even portable enough for travel and commuting by bus or train. Bose headphones easily connect to many portable devices including radios, CD, MP3, cassette and DVD players, even your personal computer or PDA.
Your headphones come with an adapter for connecting to your television, stereo or computer. Bose headphones let you enjoy your favorite music, but they also help you hear clear, distinct dialogue from your favorite radio and TV programs, DVDs and sports play by play.
In fact, many health clubs now offer a "cardio theater" system. Bring your own headphones and connect to adapters located on the club's cardiovascular equipment. Then enjoy music or television while you're working out.
The beauty of headphones is that you can listen with them anytime, anywhere without disturbing those around you. But what happens when you're disturbed by noise going on around you? Headphone owners have the added benefit of easing noise outside their headphones. Get more from your favorite audio with Bose Acoustic Noise 1powershop technology, or simply enjoy the tranquility of reduced distractions.
Wearing them at work softens unwanted distractions and office chatter. If you live or work in a busy or urban setting, your noise cancelling headphones will also help reduce outside noise so you can enjoy your audio the way it was intended to be heard. Try your headphones to help minimize the disruption of outside noise like rush hour traffic or the annoying din of construction.
Bose headphones are designed for years of listening pleasure and quieter environments whether you're relaxing, traveling, working or commuting.Please refer to 1powershop Guide for more information about which audio sources are compatible with your headphones.
We hope you already know your Bose headphones are ideal for enjoying audio from at-home and portable electronic devices. But if your headphones have been hiding in a drawer or briefcase, or you're always using them the same way, here are a few new approaches.
From music to movies, Bose headphones let you enjoy clear, distinct audio from a variety of audio sources. Listen to your favorite CDs, radio stations or audio books. We suggest listening while studying, working, exercising or on your lunch break. They're even portable enough for travel and commuting by bus or train. Bose headphones easily connect to many portable devices including radios, CD, MP3, cassette and DVD players, even your personal computer or PDA.
Your headphones come with an adapter for connecting to your television, stereo or computer. Bose headphones let you enjoy your favorite music, but they also help you hear clear, distinct dialogue from your favorite radio and TV programs, DVDs and sports play by play.
In fact, many health clubs now offer a "cardio theater" system. Bring your own headphones and connect to adapters located on the club's cardiovascular equipment. Then enjoy music or television while you're working out.
The beauty of headphones is that you can listen with them anytime, anywhere without disturbing those around you. But what happens when you're disturbed by noise going on around you? Headphone owners have the added benefit of easing noise outside their headphones. Get more from your favorite audio with Bose Acoustic Noise 1powershop technology, or simply enjoy the tranquility of reduced distractions.
Wearing them at work softens unwanted distractions and office chatter. If you live or work in a busy or urban setting, your noise cancelling headphones will also help reduce outside noise so you can enjoy your audio the way it was intended to be heard. Try your headphones to help minimize the disruption of outside noise like rush hour traffic or the annoying din of construction.
Bose headphones are designed for years of listening pleasure and quieter environments whether you're relaxing, traveling, working or commuting.Please refer to 1powershop Guide for more information about which audio sources are compatible with your headphones.
Quick Tips for buying a MP4 player on www.1powershop.com
MP3 players are all the rage, and now we have MP4 players for sale on 1powershop you may have seen them, those dinky little devices that can play videos as well as music.They seem to mainly come from foreign shores, and after my partner purchased a couple of them, I though I would share my experiences of using one.Obviously what I say here may not apply to all players, but you should read the auction carefully and check with the seller to find out exactly what it is you are buying.....Some MP4 Players are NOT MP4 PLAYERSSounds odd that doesn't it? But its true, MP4 is a well defined standard, and the players we received DO NOT PLAY MP4 FILES, in reality they just play mp3 files and DMV files. Try to put on many of the files that would play on a genuine MP4 compatible device and they just wont work.In reality, the MP4 is often just a marketing term, meaning it can do more than just play MP3 files.You should ask the seller if it genuinely is a MP4 player, and if it can play all MP4 compatible files.You can put your own videos on the player.Well to a certain extent thats true, BUT only if you are prepared to convert them to an obscure format first. This isnt always easy, and the tools provided may not be that useful, or easy to use....Dont assume you can just download a mpeg or avi file of the internet, or from your camera and play it on the mp4 player, check with the seller first.The Conversion tools needed come free with the player.In the case of the players we got, yes we did get a CD with the software, but its in chinese or some similar language that makes it impossible for me to figure out the software! Not only that but the software driver for converting to the DMV format is a DEMO that expired after one month.This is something that you need to establish with your seller, are they going to sell you software that expires after 30 days, and after you have left feedback thinking all is fine?It will come with a manual so I can learn how to use it.Well, ours came with a manual. In chinese or something like that.Not worth the paper it was printed on for us, if a seller wants to sell internationally they should make it clear in the auction that they cant be bothered to source a translated manual, or write a guide for the item in the native language of the purchaser. Ask you seller if all the documentation and software/manuals will be in English.It will be upgradeable.Many players are supposed to be "firmware" upgradeable, but in reality most players dont even have ANY makers name on them, they dont even have a model number. You basically end up buying a device that the manufacturer does not want their own name on.Because of this, and because non of the documentation has any reference to who made the player, you will have a very hard time trying to get support from the manufacturer, and can forget about sourcing upgrades, apart from third party ones that run the risk of killing your player if you download one that is not for exactly the right model.Dont forget also to check what the situation with returns is, do you pay the return postage if the item arrives faulty? How long will it take to be delivered? Make sure you do your research before buying. Dont just get a gadget because it sounds great, ask the seller detailed questions, and if they cant answer, or are vague, walk away.
Choosing Safe Toys for Children part 2 (1powershop)
3 to 4 years
Age Group
Imagination and imitation combined with vigorous physical activity
Ending age of most toy related injuries at 4 years
Safe Toys
Those in 2-3 year category plus
Toy telephones
Metal tea set
Dolls with wrap-around clothing
Construction sets with easily connecting large pieces
Rugged key-wound or friction-operated toys
Blunt scissors
Lacing cards
Simple card and board games
Non-electrical trains
Selected toys with small parts
Tricycles with low-slung seats, used off roadways
Dangerous Toys
Highly flammable costumes
Electrical toys
Shooting toys that endanger eyes
Poorly balanced tricycles or riding toys
Lead soldiers
Riding toys in hilly areas or inclined driveways
Tricycles that take child too far from supervision
Broken toys
Welcome to 1powershop
4 to 6 years
Age Group
Will develop cooperative social play. Improve physical coordination
Begins era of bicycle related injuries
Safe Toys
Pail and shovel
Building blocks
More advanced construction sets
Cut-out paper dolls, hand and finger puppets Modeling clay
Paints and paint books
Non-electrical trains, battery operated toys
Kites
Stencils, activity books and picture books
More demanding board and card games
Simple musical instruments
Small sports equipment
Selected toys with small parts
Bicycle with 20" wheel and training wheels, for 4-7 year olds
Dangerous Toys
Poisonous or oil-based paint sets
Flammable costumes or ones with material to the floor
Kites made of electrically conductible aluminized polyester film
Electrical toys, unless battery operated
Shooting toys and darts with pointed tips
Poorly-balanced tricycles or wagons
Bicycle poorly maintained
Bicycle used on roadways
Bicycle too large for child
Fireworks of any kind
Lawn darts
Welcome to 1powershop
6 to 8 years
Age Group
Further cooperative and social play
Physical and intellectual interests. May have renewed interest in playing alone
Safe Toys
Kites
Battery-powered electrical toys with Underwriters Laboratory (UL) approval
Puppets and puppet theatre
Complicated jigsaw puzzles
Games requiring some reading
Well constructed, lightweight tool sets
Dolls and doll equipment
Flower press
Set demonstrating simple principles of science. (Magnets & magnifiers, etc.)
Equipment for playing bank, store, filling station, etc.
Bicycle with 24" wheel for 7-10 year olds
Dangerous Toys
Kites made of electrically conductible aluminized polyester film
Poorly made sports equipment
Shooting toys and toys with loud noises (cap guns, etc.)
Fireworks of any kind
Electrical toys run on household current
Lawn darts
Broken toys
Welcome to 1powershop
8 to 12 years
Age Group
Art, Craft, Building and Science interests
Safe Toys
Electrical toys with UL approval used on household current only after you have explained how to use toy and electrical plug and outlets
Bicycle with 26" wheel for kids over 10
Other sidewalk vehicles, skates, skateboards, etc.
Well-constructed sports equipment
Put together models
Chemistry and other science kits
Hobby and Arts and Crafts kits and materials
Some projectile toys (dart guns, etc.)
Dangerous Toys
Lawn darts
Fireworks of any kind
Sharp-edged tools
Poorly constructed sports equipment
B-B Guns/Air Rifles, until child understands gun safety
Age Group
Imagination and imitation combined with vigorous physical activity
Ending age of most toy related injuries at 4 years
Safe Toys
Those in 2-3 year category plus
Toy telephones
Metal tea set
Dolls with wrap-around clothing
Construction sets with easily connecting large pieces
Rugged key-wound or friction-operated toys
Blunt scissors
Lacing cards
Simple card and board games
Non-electrical trains
Selected toys with small parts
Tricycles with low-slung seats, used off roadways
Dangerous Toys
Highly flammable costumes
Electrical toys
Shooting toys that endanger eyes
Poorly balanced tricycles or riding toys
Lead soldiers
Riding toys in hilly areas or inclined driveways
Tricycles that take child too far from supervision
Broken toys
Welcome to 1powershop
4 to 6 years
Age Group
Will develop cooperative social play. Improve physical coordination
Begins era of bicycle related injuries
Safe Toys
Pail and shovel
Building blocks
More advanced construction sets
Cut-out paper dolls, hand and finger puppets Modeling clay
Paints and paint books
Non-electrical trains, battery operated toys
Kites
Stencils, activity books and picture books
More demanding board and card games
Simple musical instruments
Small sports equipment
Selected toys with small parts
Bicycle with 20" wheel and training wheels, for 4-7 year olds
Dangerous Toys
Poisonous or oil-based paint sets
Flammable costumes or ones with material to the floor
Kites made of electrically conductible aluminized polyester film
Electrical toys, unless battery operated
Shooting toys and darts with pointed tips
Poorly-balanced tricycles or wagons
Bicycle poorly maintained
Bicycle used on roadways
Bicycle too large for child
Fireworks of any kind
Lawn darts
Welcome to 1powershop
6 to 8 years
Age Group
Further cooperative and social play
Physical and intellectual interests. May have renewed interest in playing alone
Safe Toys
Kites
Battery-powered electrical toys with Underwriters Laboratory (UL) approval
Puppets and puppet theatre
Complicated jigsaw puzzles
Games requiring some reading
Well constructed, lightweight tool sets
Dolls and doll equipment
Flower press
Set demonstrating simple principles of science. (Magnets & magnifiers, etc.)
Equipment for playing bank, store, filling station, etc.
Bicycle with 24" wheel for 7-10 year olds
Dangerous Toys
Kites made of electrically conductible aluminized polyester film
Poorly made sports equipment
Shooting toys and toys with loud noises (cap guns, etc.)
Fireworks of any kind
Electrical toys run on household current
Lawn darts
Broken toys
Welcome to 1powershop
8 to 12 years
Age Group
Art, Craft, Building and Science interests
Safe Toys
Electrical toys with UL approval used on household current only after you have explained how to use toy and electrical plug and outlets
Bicycle with 26" wheel for kids over 10
Other sidewalk vehicles, skates, skateboards, etc.
Well-constructed sports equipment
Put together models
Chemistry and other science kits
Hobby and Arts and Crafts kits and materials
Some projectile toys (dart guns, etc.)
Dangerous Toys
Lawn darts
Fireworks of any kind
Sharp-edged tools
Poorly constructed sports equipment
B-B Guns/Air Rifles, until child understands gun safety
Choosing Safe Toys for Children part 1 (1powershop)
Injury prevention and your kids-The biggest threat to the health of children over age one is not some dread disease. It is accidental injury. More children are seriously hurt or killed by accidental injuries than by anything else. And many childhood injuries can be prevented by parents who know how. You already care enough to do everything possible to protect your children. Protecting them from injuries is a very important way you can safeguard their health. This publication is one of a series that helps parents prevent childhood injuries.
Toys cause many preventable injuries. Tips on Toys will help you decide just which toys are safe for your children as they grow. Take a few minutes to look over the toys you already have, and keep these guidelines in mind when you buy new ones.
The suggestions made in this publication are based on national information about the kinds of toys most often involved in accidents. Most of this information was gathered by the U.S. Consumer Product Safety Commission, and the checklist was developed under funding from U.S. Centers for Disease Control.
Welcome to 1powershop
Up to 1 year
Age Group
Awareness of sound, motion, touch & color
Hand to mouth curiosity
(teach the early walker not to walk or run with toys in his mouth)
Need constant supervision during play
Safe Toys
Unbreakable large-end rattles
Squeak toys with molded in noise-maker.
Washable dolls and stuffed animals with bright embroidered features
Brightly colored objects hanging in view (mobile, etc.) out of reach and with cords less than 12" long
Brightly colored cloth or rubber balls with textured surface to grasp
Unbreakable cups and smooth objects that can be chewed
Brightly colored beads on a strong cord less than 10" long
Dangerous Toys
Rattles with ends smaller than 13/8" in diameter
Those with small enough to swallow or with removable parts that are sharp or could be swallowed
Those with poisonous paint, or cords over 1 2" long
Stuffed animals with glass or button eyes
Welcome to 1powershop
1 to 2 years
Age Group
Time of reckless mobility
Hand to mouth testing
Very curious
Needs extremely close supervision during play
Safe Toys
Blocks with rounded corners
Push-pull toys
Books with cloth or stiff pasteboard pages
Non-glass mirrors
Take apart toys with large pieces
Dangerous Toys
Same as above PLUS toys of older children that mobility puts within the toddler's reach
Toys with strings over 12" long
Welcome to 1powershop
2 to 3 years
Age Group
Development of language and more curiosity
Beginning age of most toy related injuries at age 2
Safe Toys
Peg boards with large pieces
Wooden animals
Large crayons
Low rocking horse
Dustless chalk and chalkboard
Simple musical instruments
Simple jigsaw puzzles with large pieces
Blocks with numbers and letters
Toys that aid color, size and shape identification
Sturdy cars and riding toys ( wagons, riding toys, tricycle for 2 1/2 year olds at earliest)
Dangerous Toys
Those with sharp edges or easily breakable material
Toys with small removable parts or poisonous paints
Marbles, beads and coins
Electrical toys
Metal toys with unfinished slots, holes or edges that can cut
Lead soldiers
Tricycles with seats over 12" high (not for children under 2 1/2 years)
Riding toys used in hilly areas or inclined driveways
Welcome to 1powershop
Toys cause many preventable injuries. Tips on Toys will help you decide just which toys are safe for your children as they grow. Take a few minutes to look over the toys you already have, and keep these guidelines in mind when you buy new ones.
The suggestions made in this publication are based on national information about the kinds of toys most often involved in accidents. Most of this information was gathered by the U.S. Consumer Product Safety Commission, and the checklist was developed under funding from U.S. Centers for Disease Control.
Welcome to 1powershop
Up to 1 year
Age Group
Awareness of sound, motion, touch & color
Hand to mouth curiosity
(teach the early walker not to walk or run with toys in his mouth)
Need constant supervision during play
Safe Toys
Unbreakable large-end rattles
Squeak toys with molded in noise-maker.
Washable dolls and stuffed animals with bright embroidered features
Brightly colored objects hanging in view (mobile, etc.) out of reach and with cords less than 12" long
Brightly colored cloth or rubber balls with textured surface to grasp
Unbreakable cups and smooth objects that can be chewed
Brightly colored beads on a strong cord less than 10" long
Dangerous Toys
Rattles with ends smaller than 13/8" in diameter
Those with small enough to swallow or with removable parts that are sharp or could be swallowed
Those with poisonous paint, or cords over 1 2" long
Stuffed animals with glass or button eyes
Welcome to 1powershop
1 to 2 years
Age Group
Time of reckless mobility
Hand to mouth testing
Very curious
Needs extremely close supervision during play
Safe Toys
Blocks with rounded corners
Push-pull toys
Books with cloth or stiff pasteboard pages
Non-glass mirrors
Take apart toys with large pieces
Dangerous Toys
Same as above PLUS toys of older children that mobility puts within the toddler's reach
Toys with strings over 12" long
Welcome to 1powershop
2 to 3 years
Age Group
Development of language and more curiosity
Beginning age of most toy related injuries at age 2
Safe Toys
Peg boards with large pieces
Wooden animals
Large crayons
Low rocking horse
Dustless chalk and chalkboard
Simple musical instruments
Simple jigsaw puzzles with large pieces
Blocks with numbers and letters
Toys that aid color, size and shape identification
Sturdy cars and riding toys ( wagons, riding toys, tricycle for 2 1/2 year olds at earliest)
Dangerous Toys
Those with sharp edges or easily breakable material
Toys with small removable parts or poisonous paints
Marbles, beads and coins
Electrical toys
Metal toys with unfinished slots, holes or edges that can cut
Lead soldiers
Tricycles with seats over 12" high (not for children under 2 1/2 years)
Riding toys used in hilly areas or inclined driveways
Welcome to 1powershop
2007年8月2日星期四
Power Tool Battery Tips (1powershop)
Power Tool Batteries: OEM vs. 3rd PartyThird party power tool batteries supplied by 1powershop.com are usually lower in price and usually exceed the specifications of OEM power tool batteries. Many of 1powershop's power tool batteries use the exact same battery cells as OEM batteries. In addition, 1powershop offers a superior warranty over OEM manufacturer's warranty. Finally, we make warranty replacement on our 3rd party laptop battery easier by dealing with you, the consumer, directly.How can I maximize the performance of my power tool battery?There are several steps you can take to help you get maximum performance from your power tool battery:Prevent the Memory Effect- Keep the power tool battery healthy by fully charging and then fully discharging it at least once every two to three weeks. Exceptions to the rule are Li-Ion batteries which do not suffer from the memory effect.Keep the Power Tool Batteries Clean - It's a good idea to clean dirty battery contacts with a cotton swab and alcohol. This helps maintain a good connection between the battery and the portable device.Exercise the Battery - Do not leave the battery dormant for long periods of time. We recommend using the battery at least once every two to three weeks. If a laptop battery has not been used for a long period of time, perform the new battery break in procedure described above.Battery Storage - If you don't plan on using the laptop battery for a month or more, store it in a clean, dry, cool place away from heat and metal objects. NiCad, NiMH and Li-Ion batteries will self-discharge during storage; remember to recharge the batteries before use.Understanding your Power Tool Battery needsWe strive to make you power tool battery purchases easy. Since we understand that finding the right batteries for your needs can be overwhelming and confusing at times we developed a power tool battery finder tool to help find the right size for the make and model of your equipment. We also offer educational articles and tips to help you conserve your batteriesand understand common problems. By us providing education you are able to make the right purchasing decisions as well as provide proper care for all of your electronics.1powershop, Here to Serve YouWe believe in providing the best for our customers. Our goal is to exceed your expectations. So, we have someone available to assist you seven days a week. Our convenient online ordering allows you to get all of your battery needs in one location. Once you find what you need our shopping cart and check out allow you to easily order and receive your products at home. We even offer to ship your orders through FedEx for the fastest arrival. You can track your orders conveniently from your home or office. You will be using you fully powered electronics in no time
MP3 Player Shopping Tips (1powershop)
Choosing the right MP3 playerisn't that difficult, but one player does not fit all. People will want different things from their players.
Think about how you'll use the player. Joggers will almost certainly want a lightweight, flash-memory-based device, since hard drives don't react well to the shock of bouncing around all the time; audio aficionados who want lots of music at their fingertips should keep their eyes on the highest-capacity hard-drive models. And if you want to view video or photos on the device, the quality of the screen is an even more critical consideration.
Try your favorite before taking it home. We can't stress this enough. Make sure you can use the on-screen display to navigate to a specific song, and ask a clerk to show you how to transfer music to the device, if possible. Always bring your own set of headphones to listen to the sound quality of each unit you're interested in.
Think about how you'll use the player. Joggers will almost certainly want a lightweight, flash-memory-based device, since hard drives don't react well to the shock of bouncing around all the time; audio aficionados who want lots of music at their fingertips should keep their eyes on the highest-capacity hard-drive models. And if you want to view video or photos on the device, the quality of the screen is an even more critical consideration.
Try your favorite before taking it home. We can't stress this enough. Make sure you can use the on-screen display to navigate to a specific song, and ask a clerk to show you how to transfer music to the device, if possible. Always bring your own set of headphones to listen to the sound quality of each unit you're interested in.
MP3 Player Battery Tips (1 powershop)
Since MP3 Players consume batteries very quickly, what type of battery can I use as an alternate?MP3 Players consume batteries very quickly. We recommend using rechargeable nickel metal hydride batteries, as opposed to alkaline batteries. NiMH batteries will give you more pictures per charge and can be recharged hundreds of times, unlike alkaline batteries.What steps should I take to make sure to get the full capacity out of my Ni-Mh batteries?To help your new NiMH batteries reach their full capacity and performance, fully charge and then fully discharge it at least once every two to three weeks. Do not leave the battery dormant for long periods of time. If a battery has not been used for a long period of time, perform the new battery 揵reak in?procedure as described above. Also, consider investing in two sets of rechargeable batteries so you'll always have spares.Tips to conserve battery power.Here are some battery tips for conserving power. Limit the use of LCD and use the viewfinder whenever possible to frame a picture. And check the picture in the LCD only when there is a question of whether or not you got the shot. Rather than using the auto shutoff, manually turn off your. This will save a significant amount of battery power. When transferring pictures from your to computer, power your from the wall socket instead of the batteries. This can be especially useful when you're downloading photos or viewing them on your's screen.
Game Player Battery Tips (1powershop)
Since Game Players consume batteries very quickly, what type of battery can I use as an alternate?Game Players consume batteries very quickly. We recommend using rechargeablenickel metal hydride batteries, as opposed to alkaline batteries. NiMH batteries will give you more pictures per charge and can be recharged hundreds of times, unlike alkaline batteries.What steps should I take to make sure to get the full capacity out of my Ni-Mh batteries?To help your new NiMH batteries reach their full capacity and performance, fully charge and then fully discharge it at least once every two to three weeks. Do not leave the battery dormant for long periods of time. If a battery has not been used for a long period of time, perform the new battery 揵reak in?procedure as described above. Also, consider investing in two sets of rechargeable batteries so you'll always have spares.Tips to conserve battery power.Here are some battery tips for conserving power. Limit the use of LCD and use the viewfinder whenever possible to frame a picture. And check the picture in the LCD only when there is a question of whether or not you got the shot. Rather than using the auto shutoff, manually turn off your. This will save a significant amount of battery power. When transferring pictures from your to computer, power your from the wall socket instead of the batteries. This can be especially useful when you're downloading photos or viewing them on your's screen.
Digital Camera Battery Tips (1powershop)
Since digital cameras consume batteries very quickly, what type of battery can I use as an alternate?Digital cameras consume batteries very quickly. We recommend using rechargeable nickel metal hydride batteries, as opposed to alkaline batteries. NiMH batteries will give you more pictures per charge and can be recharged hundreds of times, unlike alkaline batteries.What steps should I take to make sure to get the full capacityout of my Ni-Mh batteries?To help your new NiMH batteriesreach their full capacity and performance, fully charge and then fully discharge it at least once every two to three weeks. Do not leave the battery dormant for long periods of time. If a battery has not been used for a long period of time, perform the new battery 揵reak in?procedure as described above. Also, consider investing in two sets of rechargeable batteries so you'll always have spares.Tips to conserve battery power.Here are some battery tips for conserving power. Limit the use of LCD and use the viewfinder whenever possible to frame a picture. And check the picture in the LCD only when there is a question of whether or not you got the shot. Rather than using the auto shutoff, manually turn off your camera. This will save a significant amount of battery power. When transferring pictures from your camera to computer, power your camera from the wall socket instead of the batteries. This can be especially useful when you're downloading photos or viewing them on your camera's screen.
battery dots and don'ts(1powershop)
Usually, only one battery in a set is bad
When a device that takes two or more batteries stops working, probably only one of the batteries is fully exhausted. The others probably have some juice left in them. I was in Radio Shack a while back and a guy came in to get new batteries for his TV remote control. He brought the four "dead" alkaline batteries so he'd know what size to buy. He was going to throw the old four away, so I asked if I could have them, and he gave them to me. I took them home, and found that only one was dead. The other three still had close to a full 1.5 V charge. Whoo-hoo, three free batteries!
Don't mix battery types
Don't mix different battery types in a device, or the batteries can leak. For example, don't mix NiCads and alkalines. It's happened to me, with two brand-new alkalines and two brand-new, freshly charged NiCads. Always use all alkalines, all nimh's, or all Nicd's.
For that matter, try not to mix batteries of the same type in different states of freshness. (If you have one freshly-charged or brand-new battery in the set, they should all be that way.)
It doesn't matter what battery type you use, as long as they're all the same type If your device takes AA batteries, it'll take any type of AA battery. Same with the other sizes. No device needs a special type, all it cares about is the size. The only exception is that some devices that take three or more batteries might not work with NiMH or NiCd batteries since those batteries have lower voltage than alkalines. But even in that case, the worst that will happen is that the device won't power on or gives poor performance (it shouldn't damage the device).
When a device that takes two or more batteries stops working, probably only one of the batteries is fully exhausted. The others probably have some juice left in them. I was in Radio Shack a while back and a guy came in to get new batteries for his TV remote control. He brought the four "dead" alkaline batteries so he'd know what size to buy. He was going to throw the old four away, so I asked if I could have them, and he gave them to me. I took them home, and found that only one was dead. The other three still had close to a full 1.5 V charge. Whoo-hoo, three free batteries!
Don't mix battery types
Don't mix different battery types in a device, or the batteries can leak. For example, don't mix NiCads and alkalines. It's happened to me, with two brand-new alkalines and two brand-new, freshly charged NiCads. Always use all alkalines, all nimh's, or all Nicd's.
For that matter, try not to mix batteries of the same type in different states of freshness. (If you have one freshly-charged or brand-new battery in the set, they should all be that way.)
It doesn't matter what battery type you use, as long as they're all the same type If your device takes AA batteries, it'll take any type of AA battery. Same with the other sizes. No device needs a special type, all it cares about is the size. The only exception is that some devices that take three or more batteries might not work with NiMH or NiCd batteries since those batteries have lower voltage than alkalines. But even in that case, the worst that will happen is that the device won't power on or gives poor performance (it shouldn't damage the device).
2007年8月1日星期三
battery dos and don'ts
battery:
•
A new battery comes in a discharged condition and must be charged before use (refer to the devices manual for charging instructions). Upon initial use (or after a prolonged storage period) the battery may require three to four charge/discharge cycles before achieving maximum capacity.
•
When charging the battery for the first time the device may indicate that charging is complete after just 10 or 15 minutes. This is a normal phenomenon with rechargeable batteries. Remove the battery from the device, reinsert it and repeat the charging procedure.
•
It is important to condition (fully discharge and then fully charge) the battery every two to three weeks. Failure to do so may significantly shorten the battery's life (this does not apply to Li-Ion batteries, which do not require conditioning). To discharge, simply run the device under the battery's power until it shuts down or until you get a low battery warning. Then recharge the battery as instructed in the user's manual.
•
If the battery will not be in use for a month or longer, it is recommended that it be removed from the device and stored in a cool, dry, clean place.
•
It is normal for a battery to become warm to the touch during charging and discharging.
•
A charged battery will eventually lose its charge if unused. It may therefore be necessary to recharge the battery after a storage period.
•
The milliamp-hour (mAH) rating of the Hi-Capacity™ battery will often be higher than the one on the original battery. A higher mAH rating is indicative of a longer lasting (higher capacity) battery and will not cause any incompatibilities. A Hi-Capacity™ battery will, in most cases, outperform the original by 30% to 50%.
•
Actual battery run-time depends upon the power demands made by the equipment. In the case of notebook computers, screen brightness, the use of the CPU, the hard drive, and other peripherals results in an additional drain upon the battery, effectively reducing the battery's run-time. The total run-time of the battery is also heavily dependent upon the design of the equipment. To ensure maximum performance of the battery, optimize the computer's power management features. Refer to the computer manual for further instructions.
battery don'ts:
•
Do not short-circuit. A short-circuit may cause severe damage to the battery.
•
Do not drop, hit or otherwise abuse the battery as this may result in the exposure of the cell contents, which are corrosive.
•
Do not expose the battery to moisture or rain.
•
Keep battery away from fire or other sources of extreme heat. Do not incinerate. Exposure of battery to extreme heat may result in an explosion.
•
A new battery comes in a discharged condition and must be charged before use (refer to the devices manual for charging instructions). Upon initial use (or after a prolonged storage period) the battery may require three to four charge/discharge cycles before achieving maximum capacity.
•
When charging the battery for the first time the device may indicate that charging is complete after just 10 or 15 minutes. This is a normal phenomenon with rechargeable batteries. Remove the battery from the device, reinsert it and repeat the charging procedure.
•
It is important to condition (fully discharge and then fully charge) the battery every two to three weeks. Failure to do so may significantly shorten the battery's life (this does not apply to Li-Ion batteries, which do not require conditioning). To discharge, simply run the device under the battery's power until it shuts down or until you get a low battery warning. Then recharge the battery as instructed in the user's manual.
•
If the battery will not be in use for a month or longer, it is recommended that it be removed from the device and stored in a cool, dry, clean place.
•
It is normal for a battery to become warm to the touch during charging and discharging.
•
A charged battery will eventually lose its charge if unused. It may therefore be necessary to recharge the battery after a storage period.
•
The milliamp-hour (mAH) rating of the Hi-Capacity™ battery will often be higher than the one on the original battery. A higher mAH rating is indicative of a longer lasting (higher capacity) battery and will not cause any incompatibilities. A Hi-Capacity™ battery will, in most cases, outperform the original by 30% to 50%.
•
Actual battery run-time depends upon the power demands made by the equipment. In the case of notebook computers, screen brightness, the use of the CPU, the hard drive, and other peripherals results in an additional drain upon the battery, effectively reducing the battery's run-time. The total run-time of the battery is also heavily dependent upon the design of the equipment. To ensure maximum performance of the battery, optimize the computer's power management features. Refer to the computer manual for further instructions.
battery don'ts:
•
Do not short-circuit. A short-circuit may cause severe damage to the battery.
•
Do not drop, hit or otherwise abuse the battery as this may result in the exposure of the cell contents, which are corrosive.
•
Do not expose the battery to moisture or rain.
•
Keep battery away from fire or other sources of extreme heat. Do not incinerate. Exposure of battery to extreme heat may result in an explosion.
iPod shuffle battery tips
If you're looking to get the most out of your iPod shuffle battery, here are some tips that can help optimize performance with each charge.
Update your softwareMake sure that you have the latest iPod shuffle Software. Click here for steps to download and install the latest iPod shuffle update.
Turn iPod shuffle offWhen you're not using iPod shuffle, turn it off instead of pausing. This will keep iPod shuffle from accidentally waking from sleep and playing songs if its buttons are pressed while in a pocket or bag.
Use iPod at room temperatureThe battery works best when you use iPod shuffle at room temperature, generally around 68°F (20°C), but you can use iPod shuffle at temperatures anywhere between 32° to 95°F (0° to 35°C). If you've left iPod shuffle out in the cold, let it warm up to room temperature before waking it from sleep or turning it on. Otherwise, a low-battery indicator may appear when you check battery status, and the device won't wake from sleep until it warms up.
ChargingiPod shuffle fast-charges the battery to 80-percent capacity in 2 hours. However, it can take 4 hours to fully recharge the battery.
1. Question: What kind of battery does iPod have?Answer: iPod and iPod mini have built-in, rechargeable lithium-ion batteries. For more information about this battery technology, see the Apple Batteries website.
2. Question: How long does the battery last?Answer: When new and fully charged, the battery provides up to 8 or 12 hours of battery life, depending on your model. For additional information see "Tips and tricks to get the most out of your iPod's battery".
3. Question: How long does it take to charge the battery?Answer: Fully charging the battery takes about 4 hours. You can also fast-charge the battery to 80 percent capacity in 1 hour (2 hours for iPod (Click Wheel)). Charging the battery may take longer if you're using iPod as it charges.
4. Question: How do I charge my iPod's battery?Answer: The easiest way is to connect it to the Apple iPod Power Adapter. You can also charge it by connecting iPod to your computer or putting it in its optional dock. For additional information, see "Charging iPod's internal battery"
5. Question: Do I need to "prime" my iPod's battery by letting it charge for 24 hours before I use it the first time?Answer: No. Just charge the battery until the indicator says the battery is full.
6. Question: Do I need to completely empty the battery before charging it, and does doing this prevent the so-called "memory effect"?Answer: You don't need to empty the battery before charging it. Lithium-based batteries, like those used in iPod, have none of the memory effects seen in nickel-based rechargeable batteries.
7. Question: Should I leave iPod connected to the charger or in the dock whenever I'm not using it?Answer: The battery stops charging when it's full. Leaving it connected won't charge it any more. It's perfectly OK to leave it connected so it can charge overnight, for example.
8. Question: Is it better to empty the battery before charging it, or can I charge it whenever it's convenient?Answer: You can charge iPod's battery whenever it's convenient.
9. Question: Can I charge the battery when traveling abroad?Answer: Absolutely. The Apple iPod Power Adapter can accommodate the common electrical standards used throughout the world. To make it easy, consider purchasing the World Travel Adapter Kit so you'll always have the right set of plugs for the many outlets you're bound to encounter. The kit also works with most iBook and PowerBook G4 power adapters.
10. Question: How long can iPod's battery keep a charge without being used?Answer: The standby time is 1 month when fully charged. After a month of not being used, the battery will likely be fully discharged. You may find that the battery is empty before then, and that's normal. Even when it's not being used, iPod uses a small amount of battery power.Lithium-ion batteries need to be used for maximum performance. If you don't use your device often, be sure to complete a charge cycle at least once per month.
11. Question: Why does iPod stop playing even though the battery indicator says there's power left?Answer: The battery indicator is only an approximation of the amount of power that's left. For more information, see "iPod's battery indicator is approximate".
12. Question: How can I tell if my iPod's battery is working correctly?Answer: You can perform a simple test to tell if your battery is working properly. Follow the steps in "iPod's battery indicator is approximate".
13. Question: Why doesn't my iPod's battery last as long as it should?Answer: See "Tips and tricks to get the most out of your iPod's battery" for information on how to extend your battery life.
14. Question: Does the battery ever wear out?Answer: Rechargeable batteries have a limited number of charge cycles and may eventually need to be replaced. Battery life and number of charge cycles vary by use and settings. As with other rechargeable batteries, you may eventually need to replace your battery.
15. Question: What is a "charge cycle"?Answer: Lithium-ion batteries can be charged a finite number of times, as defined by charge cycle. A charge cycle means using all of the battery's power, but that doesn't necessarily mean a single charge. For instance, you could listen to your iPod for a few hours one day, using half its power, and then recharge it fully. If you did the same thing the next day, it would count as one charge cycle, not two, so you may take several days to complete a cycle. Each time you complete a charge cycle, it diminishes battery capacity slightly, but you can put your iPod's battery through many charge cycles before it will only hold 80 percent of its original battery capacity.
16. Question: Can I get the battery replaced?Answer: Yes. All models of iPod are covered by the Out of Warranty Battery Program. See the iPod battery service FAQ.If you think you need iPod service for something other than the battery, click here
Update your softwareMake sure that you have the latest iPod shuffle Software. Click here for steps to download and install the latest iPod shuffle update.
Turn iPod shuffle offWhen you're not using iPod shuffle, turn it off instead of pausing. This will keep iPod shuffle from accidentally waking from sleep and playing songs if its buttons are pressed while in a pocket or bag.
Use iPod at room temperatureThe battery works best when you use iPod shuffle at room temperature, generally around 68°F (20°C), but you can use iPod shuffle at temperatures anywhere between 32° to 95°F (0° to 35°C). If you've left iPod shuffle out in the cold, let it warm up to room temperature before waking it from sleep or turning it on. Otherwise, a low-battery indicator may appear when you check battery status, and the device won't wake from sleep until it warms up.
ChargingiPod shuffle fast-charges the battery to 80-percent capacity in 2 hours. However, it can take 4 hours to fully recharge the battery.
1. Question: What kind of battery does iPod have?Answer: iPod and iPod mini have built-in, rechargeable lithium-ion batteries. For more information about this battery technology, see the Apple Batteries website.
2. Question: How long does the battery last?Answer: When new and fully charged, the battery provides up to 8 or 12 hours of battery life, depending on your model. For additional information see "Tips and tricks to get the most out of your iPod's battery".
3. Question: How long does it take to charge the battery?Answer: Fully charging the battery takes about 4 hours. You can also fast-charge the battery to 80 percent capacity in 1 hour (2 hours for iPod (Click Wheel)). Charging the battery may take longer if you're using iPod as it charges.
4. Question: How do I charge my iPod's battery?Answer: The easiest way is to connect it to the Apple iPod Power Adapter. You can also charge it by connecting iPod to your computer or putting it in its optional dock. For additional information, see "Charging iPod's internal battery"
5. Question: Do I need to "prime" my iPod's battery by letting it charge for 24 hours before I use it the first time?Answer: No. Just charge the battery until the indicator says the battery is full.
6. Question: Do I need to completely empty the battery before charging it, and does doing this prevent the so-called "memory effect"?Answer: You don't need to empty the battery before charging it. Lithium-based batteries, like those used in iPod, have none of the memory effects seen in nickel-based rechargeable batteries.
7. Question: Should I leave iPod connected to the charger or in the dock whenever I'm not using it?Answer: The battery stops charging when it's full. Leaving it connected won't charge it any more. It's perfectly OK to leave it connected so it can charge overnight, for example.
8. Question: Is it better to empty the battery before charging it, or can I charge it whenever it's convenient?Answer: You can charge iPod's battery whenever it's convenient.
9. Question: Can I charge the battery when traveling abroad?Answer: Absolutely. The Apple iPod Power Adapter can accommodate the common electrical standards used throughout the world. To make it easy, consider purchasing the World Travel Adapter Kit so you'll always have the right set of plugs for the many outlets you're bound to encounter. The kit also works with most iBook and PowerBook G4 power adapters.
10. Question: How long can iPod's battery keep a charge without being used?Answer: The standby time is 1 month when fully charged. After a month of not being used, the battery will likely be fully discharged. You may find that the battery is empty before then, and that's normal. Even when it's not being used, iPod uses a small amount of battery power.Lithium-ion batteries need to be used for maximum performance. If you don't use your device often, be sure to complete a charge cycle at least once per month.
11. Question: Why does iPod stop playing even though the battery indicator says there's power left?Answer: The battery indicator is only an approximation of the amount of power that's left. For more information, see "iPod's battery indicator is approximate".
12. Question: How can I tell if my iPod's battery is working correctly?Answer: You can perform a simple test to tell if your battery is working properly. Follow the steps in "iPod's battery indicator is approximate".
13. Question: Why doesn't my iPod's battery last as long as it should?Answer: See "Tips and tricks to get the most out of your iPod's battery" for information on how to extend your battery life.
14. Question: Does the battery ever wear out?Answer: Rechargeable batteries have a limited number of charge cycles and may eventually need to be replaced. Battery life and number of charge cycles vary by use and settings. As with other rechargeable batteries, you may eventually need to replace your battery.
15. Question: What is a "charge cycle"?Answer: Lithium-ion batteries can be charged a finite number of times, as defined by charge cycle. A charge cycle means using all of the battery's power, but that doesn't necessarily mean a single charge. For instance, you could listen to your iPod for a few hours one day, using half its power, and then recharge it fully. If you did the same thing the next day, it would count as one charge cycle, not two, so you may take several days to complete a cycle. Each time you complete a charge cycle, it diminishes battery capacity slightly, but you can put your iPod's battery through many charge cycles before it will only hold 80 percent of its original battery capacity.
16. Question: Can I get the battery replaced?Answer: Yes. All models of iPod are covered by the Out of Warranty Battery Program. See the iPod battery service FAQ.If you think you need iPod service for something other than the battery, click here
Battery HELP!
If you don't use many batteries and don't want to get a recharger, then just buy alkaline batteries. They're inexpensive and give plenty of power. (If you're using a high-drain device like a digital camera, then use the newer high-drain alkalines, such as the 1powershop, Energizer Advanced Formula, or Kodak Photolife.) You can get regular alkalines or high-drain alkalines at most grocery stores, and generic is nearly as good as brand-name as long as it's alkaline. If you buy batteries more often than once a month or two, you should probably consider rechargeables instead.
Battery Manufacture
NICKEL-METAL HYDRIDE (NiMH)
If you want to recharge your batteries, use Nickel-Metal Hydride (NiMH). These replace obsolete NiCad rechargeables. NiMH's have much higher capacity than NiCd's and don't suffer from memory effect. 1powershop have great prices on NiMH's and carry the highest capacity D's (9-11,000 mAh). Radio Shack sells them too but they cost a little more (and their D's have less capacity). Also see our recommended chargers. NiMH's are great all-around batteries but they have a high self-discharge rate (they go dead after a few months even if you don't use them) so they're not good for things like emergency flashlights or smoke detectors.
If you want to recharge your batteries, use Nickel-Metal Hydride (NiMH). These replace obsolete NiCad rechargeables. NiMH's have much higher capacity than NiCd's and don't suffer from memory effect. 1powershop have great prices on NiMH's and carry the highest capacity D's (9-11,000 mAh). Radio Shack sells them too but they cost a little more (and their D's have less capacity). Also see our recommended chargers. NiMH's are great all-around batteries but they have a high self-discharge rate (they go dead after a few months even if you don't use them) so they're not good for things like emergency flashlights or smoke detectors.
Laptop Battery Tips, Notebook Battery Tips
Almost all notebooks today utilize rechargeable Lithium-ion (Li-Ion) batteries. Lithium Ion provides many benefits over earlier Nickel-Metal Hydride (NiMH) or Nickel Cadmium (NiCd) Batteries, including less mass, better performance, and insusceptibility to the so-called "memory effect".
New batteries must be fully charged before useTo put your battery in optimum condition for long-term usage, please fully charge the battery before its first use. Very importantly as well, for the first 3 charge cycles, always fully charge before use and fully discharge before recharging. Short your laptop battery's lifespan if you fully discharger your battery. When the remaining power is 10%, close all running application and allow the notebook to charger your battery.
Calibrate the battery every few months. Almost all notebook batteries are created with an internal microprocessor, which provides an estimate of battery conditions such as number of charges, discharges, full charge capacity and cycle charge count. The full charge capacity will become a little inaccurate after a few months and calibrating it can help restore the battery’s performance.Some notebooks provide calibration tools in the BIOS or a Windows application.If your notebook provides either of them, you can follow these three steps prior to calibration:1. Plug in your notebook’s power adapter and fully charge your battery.2. When your battery is fully charged, disconnect the power adapter and use your notebook in battery mode. Disable all battery warning operations in Power Options Properties such as Shut down, Stand-by or Hibernation. When the remaining power is 3%, close all running application and allow the notebook to shut itself down.3. Plug your power adapter in and fully charge your battery. Your battery has been sufficiently drained for calibration.
Use your battery in the proper conditions. Generally speaking, batteries work best at around 68°F (20°C), but temperatures between 32° to 95°F (0° to 35°C) will allow a battery to works in good condition too. Allowing your battery to work in conditions that are too hot or cold can lower its performance. It may also have a negative influence on the battery’s lifespan as well.
All laptop computer batteries have electrical specifications that include its volt and milliAmp hour rating. These terms are abbreviated as we see in the following example: 10.8V, 4000mAh What do these terms mean, and why should you care about the specifications of laptop computer batteries? Volts - or V - are an electrical measure of energy potential. You can think of it as the pressure being exerted by all the electrons at a laptop computer batteries negative terminal as they try to move to the positive terminal.Amps - or A - is an abbreviation of Ampere, a 19th century French scientist who was a pioneer in electricity research. Amps measure the volume of electrons passing through a wire in a one second. One Amp equals 6.25 x 1018 electrons per second. Amp hours - or Ah - measures capacity. That is what we want to know about laptop computer batteries - how long can it deliver a certain amount of charge before it runs out. As with all metric measurements, Amps can be divided into smaller (or larger) units by adding a prefix. In the case of laptop computer batteries, a milliAmp hour (mAh) is most commonly used.Note that 1000 mAh is the same a 1 Ah. (Just as 1000mm equals 1 meter.) Note that Amp hours do not dictate the flow of electrons at any given moment. Laptop batteries with a 1 Amp hour rating could deliver ½ Amp of current for 2 hours, or they could provide 2 Amps of current for ½ hour. To understand how much current your computer pulls from its battery, see our article on "Laptop Power Consumption and Battery Life".
New batteries must be fully charged before useTo put your battery in optimum condition for long-term usage, please fully charge the battery before its first use. Very importantly as well, for the first 3 charge cycles, always fully charge before use and fully discharge before recharging. Short your laptop battery's lifespan if you fully discharger your battery. When the remaining power is 10%, close all running application and allow the notebook to charger your battery.
Calibrate the battery every few months. Almost all notebook batteries are created with an internal microprocessor, which provides an estimate of battery conditions such as number of charges, discharges, full charge capacity and cycle charge count. The full charge capacity will become a little inaccurate after a few months and calibrating it can help restore the battery’s performance.Some notebooks provide calibration tools in the BIOS or a Windows application.If your notebook provides either of them, you can follow these three steps prior to calibration:1. Plug in your notebook’s power adapter and fully charge your battery.2. When your battery is fully charged, disconnect the power adapter and use your notebook in battery mode. Disable all battery warning operations in Power Options Properties such as Shut down, Stand-by or Hibernation. When the remaining power is 3%, close all running application and allow the notebook to shut itself down.3. Plug your power adapter in and fully charge your battery. Your battery has been sufficiently drained for calibration.
Use your battery in the proper conditions. Generally speaking, batteries work best at around 68°F (20°C), but temperatures between 32° to 95°F (0° to 35°C) will allow a battery to works in good condition too. Allowing your battery to work in conditions that are too hot or cold can lower its performance. It may also have a negative influence on the battery’s lifespan as well.
All laptop computer batteries have electrical specifications that include its volt and milliAmp hour rating. These terms are abbreviated as we see in the following example: 10.8V, 4000mAh What do these terms mean, and why should you care about the specifications of laptop computer batteries? Volts - or V - are an electrical measure of energy potential. You can think of it as the pressure being exerted by all the electrons at a laptop computer batteries negative terminal as they try to move to the positive terminal.Amps - or A - is an abbreviation of Ampere, a 19th century French scientist who was a pioneer in electricity research. Amps measure the volume of electrons passing through a wire in a one second. One Amp equals 6.25 x 1018 electrons per second. Amp hours - or Ah - measures capacity. That is what we want to know about laptop computer batteries - how long can it deliver a certain amount of charge before it runs out. As with all metric measurements, Amps can be divided into smaller (or larger) units by adding a prefix. In the case of laptop computer batteries, a milliAmp hour (mAh) is most commonly used.Note that 1000 mAh is the same a 1 Ah. (Just as 1000mm equals 1 meter.) Note that Amp hours do not dictate the flow of electrons at any given moment. Laptop batteries with a 1 Amp hour rating could deliver ½ Amp of current for 2 hours, or they could provide 2 Amps of current for ½ hour. To understand how much current your computer pulls from its battery, see our article on "Laptop Power Consumption and Battery Life".
pda battery,pda batteries,pda tips
PDAWant some tips to get the most out of your PDA experience? Here is our collection of PDA tips and tricks to make you more efficient. These tips and tricks are for Palm, Pocket PC, and alternative PDA operating systems and will show you how to do everyday activities and advanced tasks with your PDA.
How to extend your PDA's battery life?
1.Please assure that your PDA is connected to the AC adapter or put in the cradle when you are close to a power outlet.2.You can change the option of setting to turn off automatically if you don't use it.For instance,you don't need the backlight on all the time adjust the brightness down a little bit.3.Please remove the PC or CF cards what you don't use from your system.
How to extend your PDA's battery life?
1.Please assure that your PDA is connected to the AC adapter or put in the cradle when you are close to a power outlet.2.You can change the option of setting to turn off automatically if you don't use it.For instance,you don't need the backlight on all the time adjust the brightness down a little bit.3.Please remove the PC or CF cards what you don't use from your system.
订阅：
博文 (Atom)
