So for all you GS2 users like myself I found a great up not too long ago. We all know the gs2 battery isn't that great if your a heavy user like myself...The app is called Android Assistant. It let's you turn off your mobile connection(4g) which helps save alot of battery, also clear app history, cache and many other things..so try it out lol just though id let you guys know if you haven't seen the app around yet. 
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