wrote in message
ups.com...
Why do the battery powered clocks in personal computers tend to keep
worse time than quartz watches, even the $1 ones?

The computer batteries measure fine, at least 3.15V.

I thought that the problem was temperature swings in the computers
(25-38C), but a couple of cheapo watches taped inside the computers
kept better time.


Because the processor in your computer might hang or busy itself with other
things besides keeping time. It may also have something to do with the
clock pulses your computer uses not being exactly divisible into real time.

look for a program called D4. It is a free download and will keep your
clock synced to universal time. Also, Widows XP can sync to the same time
servers that D4 uses. Both work great!