This iphone issue is absolute garbage. Its issues like these that make me wish that iphones weren't so popular. Basically what happens when your iphone dies is the battery disconnects a circuit to prevent the low voltage from damaging the phone or the battery in its entirety. This issue can be fixed by heating up the battery to a temp which increases the voltage enough to actually charge the phone. (not trolling.. this is such a b/s problem) What I do when (not if) this happens is, I put my phone on top of the toaster until my phone gets hot. From there I am able to actually charge the battery.