If your laptop battery is failing to retaining a charge or dying out quickly, you may be able to reset it. Resetting your laptop battery depends on the type of battery you have. You'll need to look at the battery and see if there is a reset button, in which case the process is fairly straightforward. If you do not have a reset button, don't fret; there are still methods to reset the battery. If after trying these methods your battery is still not functioning properly, you may need to buy a replacement.

If Your Battery Has a Reset Button

1. While using your laptop, allow the battery to run down completely. Save your work to the hard drive or a memory stick so that it doesn't get lost once the computer dies.
2. Plug in your laptop and allow it to charge for approximately one hour without turning on the computer.
3. Hold down the Power button on the computer and the reset button on the battery simultaneously. The reset button can be held down with the tip of a pen or a straightened paper clip. Lights will go on and then off.
4. Release the buttons and turn on your computer.
5. Allow the battery to charge completely.

If Your Battery Doesn't Have a Reset Button

6. Use the computer and let the battery run down completely.
7. Plug in the computer and let the battery fully recharge without turning on the computer.
8. If Steps 1 and 2 do not work, you can download power-manager software designed for resetting a laptop battery. It's important to follow the instructions exactly, as the software is meant to be used by professionals.

Rechargeable laptop batteries tend to decrease in performance life over time and usage. Generally, a reduction in battery life can be noticed after 18 to 24 months. Once the battery life can no longer meet your portable needs, then it would be time to purchase a new battery. Replacement laptop batteries can be widely found online (see References below); make sure that the battery is compatible with the make and model of your notebook computer.

Instructions

1. Completely shut down the laptop and disconnect any cables that are plugged in.
2. Shut the monitor closed and flip the computer over so that the underside is facing you.
3. Press and move your thumb towards the direction arrow labeled on the battery safety release latch.
4. Remove the battery in an upward motion. Repeat this motion in the opposite direction when inserting the new battery.
5. Plug in the AC adapter cable to the notebook for about 8 to 12 hours to ensure a full battery