The function of the BIOS battery is to store BIOS Settings information. If the battery is dead, all the Settings will not be saved, and you need to press the F1 key to load the default Settings every time you start up.
Sometimes the computer does not turn on, because there is a problem with the BIOS Settings, take off the battery for a period of time, the information set in the BIOS will be lost, the computer will set the BIOS to the initial state, so as to solve the boot problem.
However, the initial state is definitely not the best state, so you should still set up the BIOS. Power to the clock is only one function of the BIOS battery. Knowledge extension: BIOS is English " Basic Input Output System" After literal translation, the Chinese name is " Basic input\/output system " . In fact, it is a set of programs solidified to a ROM chip on the computer motherboard, which saves the most important basic input and output programs of the computer, the self-check program after startup and the system self-start program, and it can read and write the specific information of the system Settings from the CMOS.
Its main function is to provide the lowest level and most direct hardware Settings and controls for the computer.