I found a cool trick to get my battery through the end of the day. First, make sure you put your phone on charge before you go to sleep. When you wake up, hit snooze. Repeat once, then just turn the damn thing off. You should end up sleeping another hour or so. Go ahead and get out of bed when you cannot sleep any longer, stroll into work about 2 hours late, and your phone should last to the end of the day!