I try not to drive mine in the winter so they sit unplugged unless I need to drive one, then I plug in night before.

Both 12V one is a 1st gen the other is a 2nd gen.

Rhino, hard to believe your 1st gen wouldn't start. I've left mine sit all day while hunting in -30 and come back to and it fires up. Shakes and rattles for a bit but then smooth's itself right out. It just has to spin a quarter turn and they fire....