Please help! Battery iPhone 5

I have same problem with my iPhone.i think its problem with power management ic. If the phone has not been opened send it back to apple with original things and they should sort it out.

I got a new battery charged it my mates phone and put charged battery in my iPhone it worked as long as I didn't let battery die would charge up aswell but once battery died it just would not boot. I just bought 2 new batteries but its just not booting up nothing just dead.am hoping to reflow power management ic.but I'll try doing what old turkey said first though let you know outcome. But if you have original things in it send it back to apple doesn't matter if it is out of warranty.there has been lot of problems on ios 7 with battery so they should sort it for free worth a shot

DanielAA, before going to check your PMIC, I would go and replace the lightning connector. It is entirely possible that your battery is just not charging. If that does not work, then you could check the charging circuit out. It is always possible that the Charging and USB Control Chip CSD75202w15 has failed or needs a reflow.

Hope this helps, good luck.