Ok , been letting my gf use my 4runner so she can keep miles off lease. I wake up today and see it parked in front of house and her car gone. She tells me car wouldn't start. I go check it and nothing , not even a click. I look and see she left the seat heater on. I'm sure this is what killed battery even though she swore she shut it off. Anyway I hook it up to my Mercury Grand marquis and all I get is door chime and a few clicks. Am I beat on this one? Is battery done?