I have the iphone 5c and i used my friends charger today to charge my phone, everything seemed to work normally, but after about 2 hours or so (it was no longer plugged in) i got a message saying "this cable or accessory is not certified." I wasn't sure what it meant and just dismissed it. However, my battery started to drop significantly and became very glitchy, it would keep restarting on its own and the screen became glitchy. I got home and tried to charge it with my own normal charger. At this point it was completely dead. It charged up to 5 percent and turned back on, however, it stopped charging and the percent started to drop, even while it was plugged in. I tried restarting it, but it keeps repeating the same thing. It charges until 5 percent, stops, and then shuts down. I don't know what to do and i really hope this is fixable.