My sister left my lights on for 7 hours and the car is BEYOND dead. I've done a lot of work on the car recently: new battery last month, had the battery terminal replaced, starter replaced last year, and a few other things not having to do with the start up right after I bought it a year ago. A few months ago I had the brake light connector replaced after the car wouldn't shift gears. The car is right now so dead it won't start OR shift gears without using the gear shift override switch. I think I've ruled out most of the battery problems upon start up other than it being a 20 year old car having been drained for 7 hours. Any idea what it could be?