I've had the Galaxy for over 3 weeks now, and it seems that no matter what I do, I can't get the battery to last a day even. Even killing apps, shutting of all networks and GPS, even turning on Airplane mode... the battery drains at alarming rates. It seem that the Galaxy simply does not go to sleep. On analyzing the battery history, the phone seems to be spending ridiculous times running with the screen off. From about 90% when running "normally" to even 20% to 30% with everything turned off. I'd like to hear other people's experiences. I'm hoping I don't have a defective unit. Best, C.