What is a CMOS or Clock battery?
CMOS batteries are used in desktop and laptop computers. They power the memory used to store the computers CMOS settings. CMOS settings contain basic information about the computers configuration, like amount of memory installed, types of drives installed, types of devices installed, types of ports available, power management configuration and other data. CMOS batteries are generally found in older computer designs. Most recent computer designs use flash (non-volaltile) memory to store CMOS settings.
