So plugged in my mini13 last night to charge overnight and it turned itself off at some point. Ended up late for work as alarms obviously didnt go off. I assumed I didnt plug it in properly and the battery died but that was not the case. I was unable to get it started for ages, but eventually found the correct sequence of buttons online. When it started it had 70% charge (up from about 50% when I plugged it in). So it shut itself down and also stopped receiving charge overnight. Anyone have any ideas as to what could have caused this? Is it common? Does it happen in other iphones? I rely on the phone for alarms, but also at work so if it turns off in my pocket Id be screwed. It seems to be working fine again now, but I dont trust that it wont happen again.