Normal phenomenon, almost any mobile phone in the use of fast charge will appear mobile phone fever phenomenon.
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One way is not to play the phone while charging, such as watching videos and playing games, so that the phone will be more serious, and the battery is also relatively large damage.
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If you are not in a hurry to fill the phone battery, you can also consider using a charger with lower charging power, relatively speaking, the phone will be less hot, but the charging time will be longer.
It is normal for Apple 13pro to heat up when charging with a 15w wireless charger, but if it is hot, it is necessary to pay attention to whether there is a problem with product quality. The original wireless charger does not rule out possible faults. In addition, when charging, pay attention to whether the power of the wireless charger matches the phone. For mobile phones that support wireless charging, just place the phone in the middle of the wireless charger to charge the operation, which is relatively convenient.