2001 Kia Optima Start-Up Problem

Yesterday, when my daughter went to start the car, she found it was completely dead; not even a click from the starter.

I jumped the car after having to leave it on my battery for a good 15 minutes.

I took it and put a new battery in it. I also had the alternator and starter checked. They both checked out fine.

I drove the car around and started it a few times, then drove home and parked it. It is parked on a totally level driveway.

This morning, once again, it is totally dead.