Bought a brand new battery July 18th. Didn't drive the car from August 12th - August 29th. I came back, tried to start the car and the battery was completely dead. No radio/interior lights/power windows.

Connect battery to another to get a jump start, battery/radio/lights work. When I turn the ignition the starter clicks, but engine doesn't turn. Since the battery was completely dead, I also tried reprogramming the key, doesn't help.

Thoughts?