On 10/30/2012 6:12 AM, Michael wrote:
I have two clock/radio television units. Both have battery backups.
I installed fresh 9 volt batteries and when power was restored last
night after a 3 hour outage, the clocks were 8-10 minutes fast. What
gives? I thought the batteries were supposed to maintain the time.
Just curious.


Normal operation uses the typically very accurate 60 Hz line frequency
as the time base.