My 2008 Adrenalin with 4.6 V8(80K miles) kills the battery overnight, every night. Battery is a new last week Diehard AGM, which replaced one installed Nov. 2019. Advance Auto told me it wasn't the battery but gave me a new one anyway, it lasted one day. Mechanic has replaced the alternator(new in 2018), no change. Replaced battery terminals, nope. Disabled all door locks, nope. Disconnected aftermarket stereo, nope. Something is draining the battery, it is very frustrating, I luckily have a second car but need my truck! I have started my ST about 20 times with my little lithium power pack, amazing but tiresome. Anyone have any ideas I can suggest? I love my Yellow ST and do not want to replace it.