It has an impact on the battery, because if it is heated, it proves that its output voltage is very high, which will cause wear to the battery
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Wireless charger under normal circumstances will not harm the mobile phone, wireless charging now the working frequency is done below 1M, so the signal of the mobile phone will not have an impact.
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At present, most mobile phones on the market are in line with the QI wireless charging standard, with a built-in wireless receiver, which has a rated voltage and current, so the wireless charger has no effect on the mobile phone.
Generally will not hurt the mobile phone, even if the use of a mismatched charger, but also hurt the mobile phone battery, generally there is fever when charging, the mobile phone at normal room temperature, fever does not exceed 60℃ is normal phenomenon, will not damage the battery. As long as you usually pay attention to the correct use of the charger, the use of high-current charger time should not be too long, too long charging will cause the battery to be damaged, but also produce too much heat
Harmful, especially if the battery continues to be high temperature will affect the chemical reaction
Wireless charging also requires current, heat is normal, but not too hot, generally less than 38 degrees harmless to the phone