Ok...for the last 2 months I've been dealing with this battery drain on my new used car. Anyway, after 6-8 hours of sitting it just will not start. Just gives a clicking sound and it starts right up when jumping it, no problem. I've replaced the battery and thought that'd fix the problem. A day goes by and its fine. Day 2 battery is completely dead. I've had the alternator, starter and new battery tested and everything is A OK! I've also tried using a meter to measure amperages and what do you know...NOTHING.

I'm so Frustrated right now...any suggestions or anything I might've overlooked?

Oh..it's a SE with 2.7 engine.

No aftermarket radio, subs, speakers. It does have keyless entry and alarm.

The only item that comes to mind is maybe a bad ground,from the battery to the block.You had the right items checked and even those will not show a this symptom,especially we you drive it then do a check.Strange it is.