CMOS (Complementary Metal-Oxide Semiconductor) battery is a small, coin-shaped battery that provides power to the computer’s CMOS chip. The CMOS chip stores the computer’s BIOS settings, which include the date and time, hardware configuration, and other important information. If the CMOS battery dies or is removed, the BIOS settings will be lost and the computer may not be able to boot properly.
There are several reasons why you might need to unplug the CMOS battery. For example, you may need to clear the BIOS settings if you are experiencing problems with your computer. You may also need to unplug the CMOS battery if you are replacing the motherboard or the CMOS chip.
