Just give it some time. Charge it all the way up, then run it all the way down. Within a few days it should be golden. Mine is at 27 hours and 30% right now. Granted, that's with only 3 1/2 hours of the display being on, 15 minutes worth of phone calls and checking Facebook and Twitter here and there every once in awhile. (Been playing a lot of Skyrim, lol) If I'm using my phone like I normally do I get 16 hours easy with lots of usage. Some things will drain it quickly though. i.e. Words With Friends, Changing GO Launcher Themes, etc.