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At present, the magnetic wireless charging function of the iPhone is joked about more, but it can not withstand heat. In the case of a slightly hot phone and charger, the output power of wireless charging tends to fall from the highest 15W to only about 5W.
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In general, a larger coil leads to better heat dissipation efficiency and a more stable magnetic field. So some manufacturers are not less in this area, such as the green link launched this year magnetic wireless charger, is the use of a combined version of pure copper large coil, so as to bring stable magnetic field and better heat dissipation performance, to achieve charging speed and charging stability.
Normally, the wireless charging of Apple mobile phone relies on the principle of electromagnetic induction, in the process of electromagnetic induction, a part of the electrical energy into magnetic energy, after the coil and the mobile phone mutual induction, into the battery of 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.
Would rather direct magnetic charger heat normal charging time will certainly have a little heat.