I love my new s4 as I recently switched from an iphone. the best phone I have ever owned, good one Samsung! however, the battery life is rubbish. My iphone 4 lasted a hell of a lot longer than this. I can understand it might not last AS long as the screen is bigger and the phone is a lot more powerful and needs more battery power, however, I lose percentage ever 2-3 minutes and I don't think that's normal for such a great phone. can anyone give me ideas on how to improve the battery life? ( I've already drained the battery and recharged fully)