What are the functions and uses of computer motherboard batteries?

What is the battery on the computer motherboard used for?

The motherboard battery is the only power supply that maintains the basic information on the board. Its function is to supply the crystal oscillator and BIOS so that data is not lost. The crystal oscillator must be powered to vibrate and work continuously, otherwise the time will not run. The year, month and day will be inaccurate. When we turn on the computer, the power supply supplies power to the crystal oscillator. When we shut down the computer and lose power, the battery supplies power to the crystal oscillator.

The crystal oscillator and BIOS circuit consume very little power, that is, the current is very small. A 3.2V motherboard button lithium battery can theoretically power the motherboard for 3 to 6 years. If the motherboard battery is genuine However, it has no power within a few months of use, which means that the voltage drops from 3.2V to below 2V or even 0V. Then it is most likely caused by leakage of the motherboard circuit or diode breakdown and short circuit.

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