Charging is due to the heat generated by the energy conversion and internal resistance consumption of the phone, resulting in heating and combustion.
Mobile phone charging heat is a common sign, especially when supporting fast charging, super fast charging mobile phone charging current and voltage are relatively large, so the temperature will be higher than the current popular charging.
If wireless charging is being carried out, there will be energy consumption due to wireless transmission, and then a certain amount of heat will be generated, so there will be signs of heat when wireless charging, which is normal.
Moon wear means full of hot air.