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.

That battery — often called the "CMOS battery" after the type of memory it once powered — keeps the computer's real-time clock going. On older models, it also might deliver a trickle of power ...

Check for a dead CMOS battery. Update BIOS/Windows/drivers. Perform an EC reset (Hard reset). Let us see these in detail. 1] Reset Windows default power plans.