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CMOS Battery- CR2032 button battery
CMOS battery, also known as button battery, is a small, round battery that is mainly used to power the CMOS chip on the computer motherboard. The CMOS chip stores the computer's basic input and output system (BIOS) settings, including information such as date, time, hardware configuration, etc. The CMOS battery ensures that this information is not lost even if the computer is turned off.
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