That's what I get for leaving the back hatch slightly open. Although it should have had enough juice to run the inside lights just overnight. :/
Gonna have to design a shutoff circuit for that. Something in line with the fuse that has a timer and a relay. Or a voltage sensor.
Anyhoo, tried to jumper it this morning but HOO BOY it got the cables a bit hot. Battery must have been completely dead. And no, I did check and had them on the right way around. :)
First time I ever yanked jumper cables off a car. Thought for certain I fragged something. Left a nice spotweld on the jumpers.
Hour on the charger got it running again, but that's the first time I've ever had a problem jumpstarting a battery. It just wouldn't take a charge but boy was it drawing amps!
FWIW, a 6A charger is USELESS for high capacity batteries. It's my old Car/Cycle charger for 6/12V. Gonna take an hour to raise the battery
1V. At least it can't harm the battery at that rate.