1. It depends.
2. I am just a little hot when I am charging wireless, because I am charging with a mobile phone case, which will affect the fever, maybe I will feel better if I take off the mobile phone case. The rest of the time, there's not much fever.
3. Mainly when playing games, play king glory, the back up near the camera position heat, the body feeling is almost 40 degrees, and full of video games, seven or eight king is almost out of power