Winterized JETLAG last weekend and all season long I had a battery that would discharge in a day or two. Took the battery and had it checked and they always said it was ok but again it would discharge. I kept looking for something draining that battery and will winterizing I think I found it. I have a sump box drain that my air conditioner condensation drains to. I always clean it out before winter storage and this year when I reached in to lift the float switch it "bit" me! Sure enough there was a little DC current running thru the water in the drain. I am thinking of replacing it with one of the venturi type drains that sucks the water out of the pan as the A/C runs.