It burns slightly. However, do not worry, after 3C certification, it will not affect the normal use of your mobile phone.
? When the mobile phone uses the original 20W fast charging head to charge from low power, it will indeed cause the mobile phone to overheat because of the increased high voltage and high current, so when it is quickly charged to about 80% of the power, it is necessary to protect the battery and prevent long-term high-power charging from overheating, thereby damaging the battery.
The management system of the mobile phone battery switches to a constant voltage 5V charging mode, reducing the current, so the charging speed will be significantly slower.
When the battery is quickly full, it will switch to a trickle mode and recharge with a small current, which is the principle of fast charging.
This situation is likely to be caused by the mismatch between the charger and the phone, the phone is hot, when this happens, you should immediately stop the phone charging, cut off the power, so that the phone is fully cooled. Otherwise, it is likely to lead to the charger or broken mobile phone phenomenon when using a mobile phone charger, be sure to use the original charger that matches the phone model to charge.
In this case, first of all, see if your phone is not fast charging does not meet the charging requirements of 20w fast charging head.
Whether it is a fast charge, or an ordinary charger, the charging process will have a slight heat. Do not worry about high-power fast charging will be hot, if really hot, that is bad, pay attention to power to prevent fire.