How To Change Cmos Battery In Computer. The CMOS battery provides power used to save the BIOS settings this is how your computer knows how much time has passed even when its been powered-off for a while so removing the battery will remove the source of power and clear the settings. If you decide to change the boot order disable a USB device or even set a BIOS password it would all be pointless if the settings disappeared when you turned off your computer and unplugged it.
Replace CMOS Battery CMOS battery is the small button type battery which is usually found on the motherboard. Though TTL chips are still available there is no real advantage in using them. All personal computers have a small battery on the motherboard that provides power to the Complementary Metal Oxide Semiconductor CMOS chip hence the name CMOS battery.
It is generally present with the model number CR2032 3VA standard CMOS battery has a usage of over 5 years.
CMOS logic has superseded TTL in almost every way. RTC runs all the time even when the computer is switched off and the power to this clock is supplied by the CMOS battery. All personal computers have a small battery on the motherboard that provides power to the Complementary Metal Oxide Semiconductor CMOS chip hence the name CMOS battery. Access of these parameters is through the BIOS or system setup function of the computer.
