Originally Posted by
Heisenberg It depends on how much power the source is giving the charge especially while the phone is in use. This happens to me sometimes when I'm using my phone while it's plugged into an HP Pavilion desktop computer. It's nothing to worry about.
this was also happening from an outlet.
like ive said my iphone 3,4, or 5 never did this.
maybe the power consumption is too large for my city gird

(also my brightness was turned down all the way)
not sure, i guess ill just take it to apple for a battery test.