Not sure if you've experienced this but I have the At&t HTC One 32GB model and I noticed that it heats up when watching videos or even downloading something. It gets over 100F as I have a battery monitor which informs me and I feel how uncomfortable it is. anyone else expericing this and maybe we'll need to root and Use Set CPU to add a profile which underclocks the CPU when it goes over 90 or something like that
I could just have a faulty device but i've read a few articles where people mentioned this but it doesn't get much attention -probably because people don't wanna bad mouth the phone so to speak. who knows
Maybe a Kernel and software update will help along with battery drain.