Girlfriend got the Thunderbolt. Awesome phone, but the battery life is horrendous. I read the forums, tried turning down brightness, set lock screen for 30 seconds, turned off auto synch most of the time, got rid of the Facebook widgets and things that always try to update in the background. If anything, her battery life has gotten worse. She charged the phone all night, left my place and by the time she got to her apartment, the battery was half dead in less than 2 hours. She doesn't want to disable 4G, as 4G was the only reason she got that particular phone. Makes no sense to disable the main selling point of the device. That's like buying a Corvette and removing 5 of the spark plug wires to keep it from breaking down on the way to the store... She has been watching the battery monitor and the screen seems to be using like 90% of the power, and yet, most of the time the screen is off. So what else should we check? Does it sound like the battery itself is flunky? She loves the phone, but if it cannot go for more than 3 or 4 hours on a charge under light usage, or not even using it at all, then it is pretty much useless. Any idears?