I have a Droid Turbo 2. I purchased refurbished last summer and it's worked practically flawlessly until now. Yesterday evening I was prompted to update to the new Nougat software. I obliged and the phone seemed to work fine afterward. I used it all last night and into this morning. As I was driving to work with the phone in my pocket I felt it vibrate 4 times in about 2-3 minutes. I took it out and it appeared stalled on the Motorola screen as if booting up for some reason. It eventually booted up and was running so I put it down. Battery was at about 85% I put it back in my pocket and took it out at work (about 10 minutes later) and it's completely dead. Won't respond to power button at all. Plug it into the charger and again, nothing.

Could the Nougat update have caused this or could it be completely coincidental? Any ideas?