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".
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.
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