A battery that maintains the time, date, hard disk and other configuration settings in the CMOS memory. CMOS batteries are small and are attached directly to the motherboard. See BIOS setup and ...

Some key computer functions are governed by the CMOS (Complementary Metal-Oxide-Semiconductor), a chip on your motherboard powered by a small battery. The CMOS governs things like the system time ...

Remove the battery, unplug the charger, then press and hold the power button for 15 seconds. This resets the internal CMOS of the laptop, which can kick it out of whatever non-charging loop it's ...