I was fortunate enough to receive an iPhone for Christmas, and it has been working brilliantly so far. Except that when I plug it into the wall adaptor, it will charge for a few minutes, the stop charging, then start again in intervals of about 6 seconds. Does anyone have a way to fix this issue? Also, it works fine with my brothers adapter, and with other third party USB adapters. It's just the apple one that came in the box.