All chargers should be hot when charging, this power is large, the heat is more severe, and the place to put ventilation when charging.
The main reason is that the car charger and the charged device demand voltage or current is too large, long-term use will cause damage to the charged device, it is recommended to use the standard charger correctly. Hello, this is very normal, the charger needs to change the pressure inside, then it will produce a lot of heat, this needs to be ventilated in time.
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It is normal for fast charger to heat up. Inside the charger, when the electronic components are overcharged, some of the electricity is converted into heat. This is a normal phenomenon. The amount of heat is related to voltage, current and resistance. If the voltage and current output of the charger is relatively large, the relatively hot point, and the charging time will be shortened. So it is normal for the charger itself to heat up.