Have a parasitic draw test performed. That will tell you if an electrical circuit is drawing amperage from your battery when it's not running. If you do have a problem, the tech can isolate the circuit by pulling fuses one-by-one until the parasitic draw returns to normal. It's really easy to do and doesn't take much time.I have a 2001 Toyota Camry Solara that I drive very infrequently now. Over the past six months, I've gone through 3 batteries. The second two were still under warranty, but I can't in good conscience continue to take advantage of a warranty when it's clearly the car, not the battery, that is the problem. If I don't turn it on and run it weekly, the battery will die after 7-10 days. I just can't imagine what is draining a new battery that quickly. It has an alarm system that came with the car and a digital clock, but other than that, nothing is on. Most times, I cannot even jump it back to life. I guess I need to get it to the dealer, but it's dead in my driveway at the moment and won't take a jump. I drove it nine days ago, but last night, it wouldn't start. Any input (other than to remember to start it every 5 days) would be appreciated. Thanks!