Originally Posted by b44
I believe the clock load on a 757 is similar to the drain on your car battery. The clock draws miliamps so a good battery should still be good for 6 months to a year.
- hmm! Tell that to my squadron's 'Intelligence Officer' whose VW Golf's clock flattened his battery in 10 days...................Still, I think we can safely assume the 757's battery will last at least for full tanks.
