I could get 12-18 hours out of this phone, that was fine with me but now i can barely get 8 hours out of it. Thats with hardly using it at all. The radio is down and so is the screen, android system is way up though killing about 70% of the battery. Beautiful widget is set at 4 hours, twitter 4 hours and facebook 4 hours. When i look at whats running in the app manager though its always Facebook, whatsapp, gsa, syncmlsvc, backup assistant plus, 2x android system, com.samsung.inputenetapp, allshare play, mapservciesamsung, maps, media hub, email and voicemail. The only app i use out of all of these is facebook and whatsapp. Ive disabled backup assistant but it always shows that its running. After the update it just ruined my battery!