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

They’re never truly off. CMOS battery. It keeps the board alive with a tiny amount of current to store settings and keep time. If you’re going to store a machine for more than a year, pull the battery. Sometimes they corrode.