Something is draining my battery overnight

[lxcivic4life]

All,

Something is draining my battery really bad overnight. I charge my phone to 100%, then unplug it before I got to sleep. I wake up the next morning (7 hours later) and my battery life is at 45-50%. I check the battery usage app and all it shows is Cell Standby and Phone Idle both at around 25-30%.

I have tried turning GPS off, lowering the screen brightness all the way down, but it still drops to the same battery level.

The only thing I can think of would be Gmail app. I sometimes do get emails during the night that get pushed to my phone, but I dont think thats a big deal.

Any ideas?