My iPhone 5 battery seems to be draining abnormally fast. I started using it around 10:45 this morning and it is now 2:15 and at 58%. I've been browsing, using apps, email, and no phone calls. It seems to be dropping at about a percent every couple of minutes. To me this is an issue. It was around 65% when it came out of the box and I didn't let it run completely down before charging fully. I charged it overnight and it was at 100% this morning when I started using it. Am I being overly paranoid and should I just let it run down and re charge over night? Or do you think there's a real issue. Just typing this it dropped from 59% to 56%.