How To Charge Cmos Battery. The more you leave your laptop plugged in the longer your battery will last. Replace the RTC battery and reassemble the computer.

Disconnect AC power cord and remove internal CMOS battery. Use your fingers to grab the edge of the battery and pull it up and out of the socket holding it in place. Most batteries will last 2 to 10 years from the date theyre manufactured.
A standard CMOS battery is not rechargable.
By watching this video you can learn how to remove and replace the 3v CMOS battery on the Motherboard of your desktop or pc computer. Wait approximately 5 minutes. Your laptop components can be damaged by electrostatic discharge ESD. So you have access to the motherboard.
