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

So, a desktop PC has that little battery. What about my phone? If my phone dies and I don’t charge it for 15 hours, how is the time correct when I finally do charge it and fire it up? Same idea? There’s also a little battery in there too?