iMore

Last night my device turned itself off. It was on the charger as I always put it on to charge overnight. I got up a few hours later and discovered my phone had turned itself off. Anyone have any idea why? I've never in my life had my phone turn off on me. Thank god I got up when I did...my alarm wouldn't have gone off.. But I don't know if this is going to be a recurring issue. Anyone else have thoughts? Experiences?