So I did the OTA upgrade yesterday for my iPhone 5 to 6.1.3. Everything went good but by the time I went to bed with moderate use, my battery was at 5%. So far, it's been unplugged for 1 hr, 21 min and the battery is down to 77% with very minimal use. Suggestions on how to make this better? Reboot? Restore? At this point, I'll make it to lunch with 50% and not done anything.