If you begin to notice that your laptop’s battery is not lasting as long as it used to, then you may be able to improve its performance by re-calibrating it. Most computer companies like Apple and Dell recommend that laptop users calibrate their batteries every couple of months in order to keep them functioning properly. Laptop batteries will run out quicker as they get older, but re-calibrating can improve battery health.

Connect your laptop’s power adapter to the computer. Plug the other end into a standard electrical outlet.

Charge your laptop’s battery until the screen indicator says that it is fully charged.

Unplug your laptop from the power adapter and begin using your computer as you normally would.

Drain your laptop’s battery by keeping the screen contrast high and running several programs at once. Do not plug your laptop into the power adapter even if you receive a low battery warning.

Use your laptop until it goes into sleep mode due to low battery charge. Then plug your laptop back into the power adapter and leave it connected until the battery is fully charged again.

Information from:www.laptop-adapter-shop.com