How to Replace a Motherboard Battery

By Techwalla Contributor

Is your computer not keeping time? Are you getting CMOS errors when you start up? Do you need to reset your BIOS password? Looks like its time to replace a motherboard battery.

Step 1

Unplug the computer from the outlet. If you don't you could electrocute yourself or destroy the computer when you attempt to replace a motherboard battery.

Step 2

Wait 5 minutes for capacitors to lose their charge.

Step 3

Now open the side of the computer exposing the motherboard. Carefully look for the battery on the motherboard. Most will look like a watch battery. Some will look more like a AAA batteries wraped in plastic though.

Step 4

Once you find the battery look at how it is held on the mother board. Most have a small clip that holds the battery in place. If you are replacing a motherboard battery with a clip that sits on the battery check for a small clip on the side of the battery to slide it out.

Step 5

Using a small screwdriver to slide back any clips and take out the battery.

Step 6

Note the numbers on the battery and get an identical replacement. You can usually find them cheaper online, but most specialty battery stores will have them as well.

Step 7

Replace the motherboard battery with your new battery. Install it and close up and re-power the computer.

Tips & Warnings

  • If you have a motherboard with a battery soldered on, take it to a professional unless you are very confident soldering.