Mine is at the dealer right now being tested for battery drain but the dealer is telling me if these trucks sit for 2 or more weeks the battery will be dead and to use a maintainer if it's going to be sitting for awhile. The only thing I have on mine is a dash cam in which has motion recording so I'm sure that's part of the problem but when it's sitting in my closed garage for a couple of week there isn't any movement to record but it's thinking about recording I guess. It has died 2 times, first time after sitting for a month in my garage the battery was so dead it wouldn't even take a charge, the second time it sat outside for 6 days, it started right up, I drove it home (12 miles on highway) and put it my garage and it sat for another 6 days and it was dead again, I was able to charge the battery this time though. I will report back as to what the dealer finds but I'm guessing they'll find nothing besides my dash cam.