rfc

I'm sure you are right that the clock would keep better time on battery power....but the display goes blank when it is off the mains! The battery just keeps it from losing the setting during a power loss.

So, I wonder why computers are so much better at maintaining the time, here even though they are plugged into the same power source? I suppose it is due to the higher quality power supply and transformer.

Our microwave clock keeps good time, but my friend's doesn't. Also a difference in electronic quality, I suppose.