Apple xr uses magnetic charging heat because the electromagnetic work is not only converted into electrical energy stored in the battery, but also partly converted into heat energy consumption, and this part of the heat energy due to close to the phone, not easy to distribute and accumulate, it will reflect the start of the heat situation, which is normal.
Apple mobile phone wireless charging relies on the principle of electromagnetic induction, in the process of electromagnetic induction, part of the electrical energy into magnetic energy, after the coil and the phone mutual induction, into the battery electrical energy, in this process, the transfer of energy is not without loss, there will be a part of the heat loss, heat accumulated on the surface of the device, it will be heated.