one
It may be that the charger provided by Xiaomi is not used, and charging with other models of chargers may encounter such problems.
two
It may be that the charger is not in good contact with the data cable or the mobile phone, and poor contact will also lead to slow charging.
three
Use the mobile phone when charging, it is best not to use the mobile phone when charging, which will increase the heat of the mobile phone and the charging speed will be affected.
four
When the temperature of the phone is high, the current of charging the phone is gradually reduced in order to protect it.
Is it almost full? It's charging to a trickle