Hello, I have an upcoming reservation at the apple store, but I hate going there so I figured as a last resort I would see if anyone else is experiencing this problem and knows a fix. I've searched everywhere, including this forum without luck. My phone dies once it reaches around the low 70%'s, and asks me to plug it in before it can turn back on. I know this is a bug with older phones and articles say the 7 is immune, but mines experiencing the problem. First I tried to upgrade to the newest 10.3 beta software to see if 10.2.1 was the issue, no luck. Then I tried a DFU reset and set the iPhone up as new, but no luck there either. I also tried replacing my charger, no luck there. I noticed this morning it actually lost battery life while it was plugged in. I connected with an apple agent yesterday through my phone and he said the battery itself is fine when he ran a diagnostics check, which is why they scheduled an appointment for me. Any help would be appreciated! Thank You.