If u r experiencing battery problems, I downloaded advanced task killer app and just use it to close all apps once I open them. The apps stay open in the background if you dont force stop them. The up arrow will not stop an app, Just pause it. And samsung has some crappy apps that turn on even when u never use them. Using ATK, talking on the phone, texting, playing angry birds, I have about 40% when I get home from work. Hope that helps. You can also turn off apps from auto starting.
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