alright, had my battery out(replacing headlights) got it back in, started it up and all was well. shut it down and went inside. came back out to go somewhere, i turn the key to run and everything is fine. as soon as i try to start it, everything dies. the car has absolutely no power. i sat there thinking what could have fried. after about 5 minutes, i tried turning the key again and all the lights came back. went to start and same thing as before. what could this be? thanks.