I picked up the 2020 Corolla I bought over a week ago at auction, and it started right up. I drove it maybe 300 feet out the gate to the parking lot and turned it off so I could drop off my rental car. I come back a half hour later to drive it home, and the battery is dead. Dash doesn't light up, even the horn doesn't beep. Used my jump pack and it started fine. And no problem a hour later when I stopped for gas or for the rest of the trip home. Why would the battery be fine after sitting a week, but then quit right after, and be ok the rest of the day? This is the 12 volt battery that powers the electronics, it doesn't supply the starter.