i drove it 10 miles, shut it off, made a phone call, and was on the phone for about 15 minutes. And went on to roll the windows down, and they made it about 3/4 of the way down and stopped. i went to try to start it, and the wipers kicked in and worked once and died. it is a fairly new battery from Les Schwab, about 4 months old. Got it jumped and running. Took it to Les Schwab, and they could not find anything wrong with it. What kind of reserve is supposed to be in these batteries?