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All this information is preserved with a near quarter-sized lithium battery located directly on the motherboard of the computer. This information includes the system time, date, and system hardware settings for your computer to startup and load correctly. The CMOS acts as a battery powered semiconductor chip inside your computer that stores important information. The motherboard battery or CMOS (Complementary Metal-Oxide Semiconductor) works as a RTC (Real-Time-Clock) on your motherboard.
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Is the CMOS battery the same battery found in Automotive Key Fobs?.How do I get the CMOS out of the motherboard without damaging it?.
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