Every computer has a small battery on its motherboard. It is used to provide power to the CMOS on the computer. CMOS (Complementary Metal Oxide Semiconductor) chip on your computer remembers everything like Hard Disk, time and date etc. The CMOS battery provides power to the CMOS chip always i.e., even when your computer is OFF to save all the settings. So, it is important at the time of booting of your computer and other tasks.
CMOS battery is a small battery fitted on the motherboard of your computer. It has a life of around five years. You need to use the computer regularly to extend the life of the CMOS battery. The computer power supply increases availability of standby current and hence increases life of the battery. (more…)