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

There is a small button battery called a CMOS battery. They last for years but not forever. Your average consumer computer is replaced before the battery needs to be. But the do go bad and if the pc off and unplugged it will lose it’s time.