My old 2006 GT has killed the third battery in as many years. Over that time, if it went more than 2 days without being turned on, I’d either have to jump it or trickle charge the battery, because it lost enough charge to not turn on the car.
I’ve hooked my little car computer diagnostics reader on it several times, and it isn’t detecting whatever the problem is that’s draining the battery. Any advice on how to diagnose the problem, or where to start looking?