What Does A Cmos Battery Do. When your computer gets unplugged BIOS relies on the CMOS battery for power. BIOS needs to remain operational even when your computer isnt plugged into a power source.
To do this simple process all you need is a screwdriver depending on your specific laptops model a new CMOS battery compressed air and an ESD mat. It looks like a button or coin and its usually placed within a small holding socket. Normally this information would be lost when the computer is shut down or loses power for some r.
If the battery dies or is removed then when your computer boots it will have forgotten the current date and time.
Thats where the battery comes in. The CMOS batteries cost around 1 to 10bucks and you can find all these components in any local retailer. BIOS needs to remain operational even when your computer isnt plugged into a power source. All personal computers require a small battery on the system board that provides power to the Complementary Metal Oxide Semiconductor CMOS chip even while the computer is turned offThis chip contains information about the system configuration eg hard disk type floppy drive types date and time and the order in which the computer will look for bootable disks.
