I've bought a galaxy w a few days ago. Battery seems to drain so quick. But I don't use it much. Brightness is the lowest right now. Juice defender and samsung's own power saving mod is on. I've lost %20 of the battery in last 4 hours but i haven't used phone. In battery use section it shows that my screen is drains my battery with %50 other things around %6-8 not that much important. What's the problem? I can't figure it out!