If I completely shut down a computer and not use it for months, how can it still tell the time accurately? (given that it isn’t immediately connected to the internet)

Question

If I completely shut down a computer and not use it for months, how can it still tell the time accurately? (given that it isn’t immediately connected to the internet)

In: Technology

Answer 1

The motherboard has a small battery about the size of a quarter called a CMOS battery, it’s responsible for keeping time. The MOBO keeps time, and other BIOS/UEFI settings. If the little battery fails, your computer will stop keeping track of those things accurately.