2002 Explorer Sport Key
 

So the other day I allowed to let my girlfriend take my car to work, (bad idea). Needless to say she left the headlights on and killed the battery. She had the keys to the car but the keyless entry wouldn't work because of the power. So I told her to try the key to the car and the doors would not open with the key. I even tried to use the key. Does this suv have a different door key than ignition key? Or is it electric and everytime the car dies I'm SOL and have to have someone break into my car? Buy the way I don't know the keypad code.