At work this morning, I was listening to some streaming audio while charging the phone. I got a popup that said the battery was too cold to charge and charging would stop.
The phone has not spent any time in cold weather. OK, it's 40 outside but the phone was in my pocket and I spent very little time outside. Also, the phone had been inside for a couple of hours when I got the message.
I unplugged and replugged and it worked fine. Odd.