How to Install a CMOS Battery in a Gateway Laptop. The complementary metal-oxide semiconductor, or CMOS, stores the system date and time as well as other settings on your Gateway laptop. The CMOS ...

How to Check the Battery Level of the BIOS. If you have owned your computer for a few years, you may notice certain problems, such as it may no longer remember the current time and date, certain ...

The battery powers the CMOS memory, which stores BIOS settings. If the battery is drained, the CMOS will not remember the settings, and the BIOS will keep resetting after shutdown.