There may be the following reasons for the slow charging of mobile phones:
1. Slow charging when the charger or data cable is not plugged in or the interface is not clean: When charging, the charger, data cable, and mobile phone charging interface are not in contact, which may lead to slow charging, unable to enter the fast charging or unable to charge, please plug and unplug the charger several times. Check whether the connectors and jacks are clean. If dust is found, it is recommended to wipe it with alcohol or clean it with a brush. If alcohol wipe, need to wait for alcohol to dry, and then re-charge to confirm.
2, the ambient temperature is high, the mobile phone is hot when charging slowly: the mobile phone has a special overheat protection design, when the mobile phone temperature is high, the charging current will gradually decrease. During the charging process, the temperature of the phone will change to a certain extent, especially when the phone is charging, it also runs some high-power programs, which will make the temperature rise significantly, which will lead to slow charging. In summer, the weather is hot, the ambient temperature is high, and the heat dissipation of the mobile phone is difficult, so the charging speed will be relatively slow compared with the winter when the ambient temperature is low, which is a normal phenomenon. It is recommended that you charge the phone at room temperature as much as possible, and it is recommended to close the high-power applications running in the background when charging.
3, slow charging while using: while using the mobile phone to charge, the charger input part of the current needs to offset the screen and other mobile phone hardware consumption of electricity when using, resulting in the battery charging current will be reduced, charging speed will be slow. On the other hand, using the phone while charging will also cause the temperature of the phone to rise, and the charging speed will be further slowed down due to the thermal protection mechanism of the phone. It is recommended that you avoid using your phone while charging, especially for applications with high power consumption, such as playing games and watching videos.