Only 25% battery drain for 4 hours of wireless hotspot. The first 5 hours of the day before I tested only burned 10%. Phone did not get warm at all. Not a single drop and I was using VPN the whole time. Speed was great. This phone is a beast. I now feel like my droid RAZR was a joke, 55 min of wireless hotspot and it got hot. I purchased 2 extra batteries for this phone in case I need wireless hotspot on the road, kind of a waste. But they were cheap and they work.