Huawei's mobile phone can be disconnected when it is charged to about 80%. This is because the battery life of Huawei smartphones is related to the number of charges, and long-term charging will affect the battery life. Charging to 80% is the best, which can prolong the service life of the battery.
It is generally recommended to charge the battery when the battery charge is less than 20%, and charging when the battery charge is low can avoid excessive discharge of the battery.