I've had problems with the battery in my new 2018 outback going completely dead while parked in our garage overnight. Twice in the past month it had to be towed to the dealer. The service manager said nothing is wrong with the car. The dealer said that battery was totally drained because I left the fob inside the car -FOR 12 HOURS--. This doesn't seem reasonable. Did they really design things so poorly that leaving the fob in the car will totally drain the battery? Also, the first time the battery drained down to less than 0.1v and the internal resistance was so high that a battery charger didn't even detect that it was connected to anything. The second time I caught it before the charge got below 2v and a charger would kick in. Not much point in a design which gets ready for you to push the start button once the battery has been drained so low it couldn't even turn on the dome light.