Coin cell battery

Also known as a button cell or watch battery, a coin cell battery is a battery contained on the computers motherboard that allows it to retain important system settings and remember what the time and date is while the computer is off.  The picture to the right is an example of a coin cell battery used in many computers looks like. Additional information about replacing the CMOS battery can be found on document CH000239. Also see: Battery definitions, CMOS

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