1) The current of the data line connected to the mobile phone charging head is very small, and the current and voltage of the mobile phone charging head is much larger than that of the USB, so the mobile phone charging head will heat up.
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(2) Do not play with the mobile phone when charging, the charging head load of the mobile phone when charging = the charging load of the mobile phone power supply load, so playing the mobile phone when charging the mobile phone charging head will make the mobile phone charging head more hot, and it may burn the charging head.
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Tips for mobile phone charging to avoid overheating:
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Charge in a cool environment: If the phone charger is overheating, it is best to charge it in a cool environment in the summer, such as an air-conditioned room. So the phone charger doesn't overheat.
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Use the original charger: When charging the phone, you should use the original charger, which can ensure the output current is stable, and protect the battery. The original charger will also heat up, but it will not overheat, and there are protective devices. If your charger overheats, it is fake or not original.
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Do not play with the mobile phone when the mobile phone is charging: playing with the mobile phone when the mobile phone is charging will cause the mobile phone charger to overheat, because it needs to work for a period of time more than normal, so that the charger will not reduce the life of the charger.
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Do not overcharge: the general mobile phone charging the original charger can be fully charged in about 3 hours, and do not continue to charge after full, otherwise it will cause the charger to overload and become overheated. Unplug the charger in time.
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Be careful of the surrounding heat source: When charging the phone, the charger should be placed away from the heat source, such as the gas stove, steamer, etc., to avoid the ambient temperature is too high, causing the charger to overheat.
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Reduce the number of charges: if you charge multiple times a day, it will cause the charger to overheat, so you should control the number of charges, generally one or two days of charging, can help extend the life of the charger.
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When charging, turn off the phone as much as possible: this can extend the life of the charger, but also protect the phone.
Some chargers will leak when charging, and the charging head is hot, this situation is likely to be the insulator inside the charging head is damaged, when this problem occurs, you should immediately stop charging, change a charger to try, otherwise for a long time there may be security risks, electric shock phenomenon, it may also burn the phone or the charger.