Awsome asked:
I have been wondering about this for a long time. Suppose my computer or some other electronic device with a clock has no internet or connectivity to the outside world but has a clock on it. After the I turn it off and then turn it back on sometime in the future it will know what time it is. How can digital clocks do this? There was no power and there is no internet. How does it work? Thanks!
Comments
Low-drain lithium battery, lasts 10 years.