Laptop batteries come in all shapes and sizes also differ in their chemical composition. The chemistry of a battery refers to the chemical make-up of the cells inside the outer casing. The most common chemistries used in laptop batteries are:
NiCad (Nickel Cadmium) This is the oldest technology and is the least commonly used nowadays. NiCad batteries are prone to the "Memory effect" and are heavier than the newer technologies. NiCad is not environmentally friendly chemistry as it contains heavy metals, which cannot be disposed of in landfill sites. Most manufacturers have stopped producing batteries of this type chemistry. As an end user it will be increasingly difficult to source these batteries. The best alternative is external battery packs.
NiMH (Nickel Metal Hydride) these batteries are less likely to be prone to the memory effect and have a much better power to weight ratio than NiCad. This is a commonly used chemistry. These batteries are also being phased out by most manufacturers. However, many have lithium-ion versions that are compatible. Always consult the manufacturer or a reputable laptop battery supplier.
Li-Ion (Lithium Ion) - This is becoming the dominant technology due to its excellent power to weight ratio. Such considerations are becoming more important as mobile devices become smaller and lighter and battery weight becomes significant. Another plus point for Li-Ion is that it doesn't suffer the memory effect at all. These batteries do have a tendency to lose charge quickly towards the end of their effective life span. If this starts to happen the battery must be replaced.
These three technologies are quite different in the way they charge and therefore should not be substituted unless the device has been designed to take different chemistries. The owner's manual will describe which batteries are suitable.
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2009年2月2日星期一
2009年2月1日星期日
Care for Laptop Batteries
Care for Laptop Batteries
Lithium Ion notebook batteries wear down because of two factors:
1. active usage in your notebook battery
2. natural aging of the notebook battery
Both will wear down your laptop battery over time; the trick is to minimize their impact while still getting the performance out of your laptop battery that you need.
The most important thing to understand about laptop batteries is that they are always losing a small bit of their charge. The hotter the temperature, the faster notebook batteries loose their charge. So rule number one is: keep your notebook battery cool. Notebook battery manufacturers store their products at around 60F.
The second most important thing to understand about notebook batteries is that their capacity decreases with each cycle of charging and discharging. By itself, this is not surprising - but when combined with the previous point, it leads to a surprising conclusion.
When laptop users leave their laptop battery inside the machine but leave the computer plugged into the wall, the laptop battery is going through a constant charge-discharge cycle. The notebook battery is sitting unused inside the notebook, discharging a little faster than normal because of the notebook’s heat. Once its charge level drops to a predetermined level, the AC adapter provides extra juice to “top off” the notebook battery. As the laptop battery gets older, it tends to self-discharge a little faster, which accelerates the process even further…
Lithium ion notebook batteries normally offer 600 to 800 charge/discharge cycles over 1.5 to 3 years of useful life. When you use your notebook battery as described above, you are needlessly using your supply of recharges.
One additional note: many people recall that older notebook batteries on early computers worked best when they were fully discharged before being recharged. While that remains true for Nickel Cadmium technology, today’s Lithium Ion notebook batteries work best when they are recharged when they still have 10 to 20% capacity remaining. So if you are using your notebook battery on a long flight, try not to get in the habit of using the notebook battery until it has almost no charge. Your laptop battery literally won’t be the same when you re-charge it the next time.
Some Guidelines for notebook batteries:
1. Remember that new batteries generally arrive in a discharged state; you must charge them up for at least four hours before their first use.
2. Keep your laptop battery cool, but do not put it in the refrigerator or freezer
3. Don’t use the notebook battery if you don’t have to! Many people keep their laptop plugged in most of the time. They can preserve their battery life by storing the battery outside the laptop in a cool place.
4. Try to avoid running your laptop battery all the way to zero
5. Don’t charge your computer battery before long periods of inactivity
6. Much as we’d like to sell you more laptop batteries, don’t buy spare notebook batteries for later use. The longer you hold them, the less useful life they provide
Lithium Ion notebook batteries wear down because of two factors:
1. active usage in your notebook battery
2. natural aging of the notebook battery
Both will wear down your laptop battery over time; the trick is to minimize their impact while still getting the performance out of your laptop battery that you need.
The most important thing to understand about laptop batteries is that they are always losing a small bit of their charge. The hotter the temperature, the faster notebook batteries loose their charge. So rule number one is: keep your notebook battery cool. Notebook battery manufacturers store their products at around 60F.
The second most important thing to understand about notebook batteries is that their capacity decreases with each cycle of charging and discharging. By itself, this is not surprising - but when combined with the previous point, it leads to a surprising conclusion.
When laptop users leave their laptop battery inside the machine but leave the computer plugged into the wall, the laptop battery is going through a constant charge-discharge cycle. The notebook battery is sitting unused inside the notebook, discharging a little faster than normal because of the notebook’s heat. Once its charge level drops to a predetermined level, the AC adapter provides extra juice to “top off” the notebook battery. As the laptop battery gets older, it tends to self-discharge a little faster, which accelerates the process even further…
Lithium ion notebook batteries normally offer 600 to 800 charge/discharge cycles over 1.5 to 3 years of useful life. When you use your notebook battery as described above, you are needlessly using your supply of recharges.
One additional note: many people recall that older notebook batteries on early computers worked best when they were fully discharged before being recharged. While that remains true for Nickel Cadmium technology, today’s Lithium Ion notebook batteries work best when they are recharged when they still have 10 to 20% capacity remaining. So if you are using your notebook battery on a long flight, try not to get in the habit of using the notebook battery until it has almost no charge. Your laptop battery literally won’t be the same when you re-charge it the next time.
Some Guidelines for notebook batteries:
1. Remember that new batteries generally arrive in a discharged state; you must charge them up for at least four hours before their first use.
2. Keep your laptop battery cool, but do not put it in the refrigerator or freezer
3. Don’t use the notebook battery if you don’t have to! Many people keep their laptop plugged in most of the time. They can preserve their battery life by storing the battery outside the laptop in a cool place.
4. Try to avoid running your laptop battery all the way to zero
5. Don’t charge your computer battery before long periods of inactivity
6. Much as we’d like to sell you more laptop batteries, don’t buy spare notebook batteries for later use. The longer you hold them, the less useful life they provide
2009年1月14日星期三
Lion Battery for the MSI Wind U100 laptop
I have had chance to review one of the new six cell MSI wind u100 battery that have recently come out for the wind and I have to say that the battery preformed well even under a heavy load. You can get the MSI wind u100 battery here;
For the Black/ White MSI wind u100 battery go here:
http://www.batteriescenter.co.uk/battery-laptop/msi-wind-u100.htm
http://www.usa-batteries.com/laptop/msi-wind-u100.htm
There was a discount MSI wind u100 battery 4400mAh, which will give you a 30% discount. The price of the battery before the discount is 117.3 (US) and 73 (GBP).
The following is a review of the 6 cell, 4400 mHa replacement battery for the MSI Wind U100 Netbook.
Condition Value
Temperature 18 Degrees Celcius
Operating System Windows XP SP3 (fully updated)
Screen Brightness 100.00%
Bluetooth ON but not in use
Wireless DW1490 Powered ON and in use
BIOS MSI 1.09 BIOS
MSI wind u100 battery Running Time
The running time of the MSI wind u100 battery was recorded, under conditions stated earlier, Typical usage is as follows; web browsing, Office Software, Image manipulation Software and anti virus software. All of these softwares were used during the tests. We didn’t run games as Netbooks are not intended as gaming machines. Times were recorded using a timer program on a desktop PC and were recorded from when the power button was pressed up until the compute refused to run, ie when windows forced it into hibernation mode. The results are as follows;
The Lion MSI wind u100 battery lasted 6:10:51
Battery Eater Running Time
Battery Eater is a program for windows which disables all power saving features, enables all devices and increases output of all devices to 100%. It is unlikely that you will use your Wind in this mode but it is a good bench mark for batteries.
Lion MSI wind u100 laptop battery
Battery Info
Chemistry: LI-ION
Capacity: 4400mAh
Volt: 11.1V
Color: White/Black
Dimension: 205*55*32mm
Net Weight: 440g
Packaging and Mechanical
The MSI wind u100 laptop battery came very well packaged and you would be very unlucky if it was damaged during transit. The mechanical side of the MSI wind u100 battery seems to have been done very well, the battery fits perfectly and is secured in an identical way to the stock battery. Unlike other third party batteries I have bought, the battery is not loose when installed, is not difficult to push into the slot and was exactly the same as installing the stock battery. The Netbook is still comfortable when used on your lap as the battery doesn’t stick out that much, full marks for this.
For the Black/ White MSI wind u100 battery go here:
http://www.batteriescenter.co.uk/battery-laptop/msi-wind-u100.htm
http://www.usa-batteries.com/laptop/msi-wind-u100.htm
There was a discount MSI wind u100 battery 4400mAh, which will give you a 30% discount. The price of the battery before the discount is 117.3 (US) and 73 (GBP).
The following is a review of the 6 cell, 4400 mHa replacement battery for the MSI Wind U100 Netbook.
Condition Value
Temperature 18 Degrees Celcius
Operating System Windows XP SP3 (fully updated)
Screen Brightness 100.00%
Bluetooth ON but not in use
Wireless DW1490 Powered ON and in use
BIOS MSI 1.09 BIOS
MSI wind u100 battery Running Time
The running time of the MSI wind u100 battery was recorded, under conditions stated earlier, Typical usage is as follows; web browsing, Office Software, Image manipulation Software and anti virus software. All of these softwares were used during the tests. We didn’t run games as Netbooks are not intended as gaming machines. Times were recorded using a timer program on a desktop PC and were recorded from when the power button was pressed up until the compute refused to run, ie when windows forced it into hibernation mode. The results are as follows;
The Lion MSI wind u100 battery lasted 6:10:51
Battery Eater Running Time
Battery Eater is a program for windows which disables all power saving features, enables all devices and increases output of all devices to 100%. It is unlikely that you will use your Wind in this mode but it is a good bench mark for batteries.
Lion MSI wind u100 laptop battery
Battery Info
Chemistry: LI-ION
Capacity: 4400mAh
Volt: 11.1V
Color: White/Black
Dimension: 205*55*32mm
Net Weight: 440g
Packaging and Mechanical
The MSI wind u100 laptop battery came very well packaged and you would be very unlucky if it was damaged during transit. The mechanical side of the MSI wind u100 battery seems to have been done very well, the battery fits perfectly and is secured in an identical way to the stock battery. Unlike other third party batteries I have bought, the battery is not loose when installed, is not difficult to push into the slot and was exactly the same as installing the stock battery. The Netbook is still comfortable when used on your lap as the battery doesn’t stick out that much, full marks for this.
2009年1月9日星期五
What's the best battery?
Battery novices often brag about miracle batteries that offer very high energy densities, deliver 1000 charge/discharge cycles and are paper-thin. These attributes are indeed achievable but not on one and the same battery pack.
A certain battery may be designed for small size and long runtime but has a limited cycle life. Another pack may be built for durability and is big and bulky. A third may have high energy density and long durability but is made for a special application and is too expensive for the average consumer. A lithium-based battery can be designed for maximum energy density but its safety would be compromised.
Battery manufacturers are aware of customer needs and offer packs that best suit the application. The mobile phone industry is a good example of this clever adaptation. Here, small size and high energy density reign in favor of longevity. Short service life is not an issue because a device is often replaced before the battery is worn out.
Below is a summary of the strength and limitations of today's popular battery systems. Although energy density is paramount, other important attributes are service life, load characteristics, maintenance requirements, self-discharge costs and safety. Nickel-cadmium is the first rechargeable battery in small format and forms a standard against which other chemistries are commonly compared. The trend is towards lithium-based systems.
Nickel-cadmium - mature but has moderate energy density. Nickel-cadmium is used where long life, high discharge rate and extended temperature range is important. Main applications are two-way radios, biomedical equipment and power tools. Nickel-cadmium contains toxic metals.
Nickel-metal-hydride - has a higher energy density compared to nickel-cadmium at the expense of reduced cycle life. There are no toxic metals. Applications include mobile phones and laptop computers. NiMH is viewed as steppingstone to lithium-based systems.
Lead-acid - most economical for larger power applications where weight is of little concern. Lead-acid is the preferred choice for hospital equipment, wheelchairs, emergency lighting and UPS systems. Lead acid is inexpensive and rugged. It serves a unique niche that would be hard to replace with other systems.
Lithium-ion - fastest growing Lithium-ion battery system; offers high-energy density and low weight. Protection circuit are needed to limit voltage and current for safety reasons. Applications include notebook computers and cell phones. High current versions are available for power tools and medical devices.
Table 1 summarizes the characteristics of the common batteries. The figures are based on average ratings at time of publication. Lithium-ion is divided into three versions: The traditional cobalt that is commonly used in cell phones, cameras and laptops; the manganese (spinel) that power high-end power tools and the new phosphate that competes head-on with spinel. Lithium-ion polymer is not listed as a separate system. Its unique construction performs in a same way to cobalt-based lithium-ion.
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2008年12月5日星期五
www.batteriescenter.co.uk
About Us
We are an experienced group of internet sellers. All of our items are directly purchased by various reputable manufacturers throughout the world. They have passed strict quality assurance procedures such as CE, UL, and ISO9001/9002 certifications.
At www.batteriescenter.co.uk we discount wholesale and retail batteries, chargers, adapters for consumer electronic devices such as laptop & notebook computers, digital camera, camcorders and two way radio. All our products are guaranteed to meet or exceed OEM (original) specifications backed by full 1 year warranty guarantee and 30 days money back gurantee! The more you buy the more you save!
As follow is the high quality low price popular ibm laptop batteries I have collected at www.batteriescenter.co.uk
Apple PowerBook G4 Battery
Dell Inspiron 6000 Battery
Dell Inspiron 9400 Battery
Toshiba PA3383U-1BRS Battery
Toshiba PA2487UR Battery
Toshiba PA3331U-1BRS Battery
IBM ThinkPad T60 Battery
IBM ThinkPad R60 Battery
Acer Aspire 3000 Battery
Sony VGP-BPS2 Battery
HP Pavilion ZV5000 Battery
Compaq Presario R3000 Battery
Best Camera Batteries
CASIO NP-20 Battery
CASIO NP-40 Battery
CANON BP-511 Battery
CANON NB-2LH Battery
CANON NB-1LH Battery
NIKON EN-EL3 Battery
NIKON EN-EL3E Battery
NIKON EN-EL5 Battery
SONY NP-FC11 Battery
SONY NP-FT1 Battery
SONY NP-BG1 Battery
FUJIFILM NP-40 Battery
OLYMPUS LI-10B Battery
SANYO DB-L20 Battery
Best Camcorder Batteries
SONY NP-FM50 Battery
SONY NP-FP50 Battery
SONY NP-F330 Battery
SONY NP-F550 Battery
SB-LSM160 Battery
SB-LSM320 Battery
JVC BN-VF707 Battery
JVC BN-VF714 Battery
CANON BP-2L12 Battery
CANON BP-535 Battery
CANON BP-711 Battery
Sony NP-QM91 Battery
CANON BP-945 Battery
CGA-DU07 Battery
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