The CMOS battery is an often overlooked but crucial element. Hidden on the motherboard of your computer, it acts like an emergency power supply for the BIOS.

The motherboard of PCs and laptops contains a battery that runs the CMOS (complementary metal-oxide-semiconductor) and keeps the computer's clock accurate. Although it may not seem vital to the ...

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.

If you're getting errors when you boot your PC, the problem may be nothing more than a dead CMOS battery. Fortunately, they're cheap and easy to replace--on desktops, anyway.

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 ...