What is the function of laptop button battery?

1. This battery stores the basic settings of the computer's motherboard, and also supplies the internal clock of the bios to keep the clock running normally. In this way, we don't have to readjust the time every time we turn on the computer. If the battery is out of power, a bios error will be displayed when booting, asking you to reset it or press F1 to skip setting it. 2. Keep the motherboard bios settings. Press the delete key after booting to enter the bios motherboard settings page, where you can set the motherboard, including date and time, as well as various motherboard parameters, etc. Once the battery is unplugged, all these settings will be lost.

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