I just upgraded to iOS 7 last night. Everything went flawless. So far, I like it. However, I am noticing considerable battery drain. I took my phone off the charger with 100% at 6:30. I barely used it and by 8:30 I was down to 72%. With drain like this, there is no way my phone would last a day without having to re-charge. Before iOS 7, I would get 1 full day with normal use. Any tips / tricks / suggestions on how to conserve the battery with iOS 7 ?