Maybe there's dust from the charging port. Wipe it off with alcohol.
1. Check the charging interface, because we are used to putting the mobile phone in the pocket, the charging interface located at the bottom of the mobile phone is easy to enter the ash, and the interface is easy to contact with the power cord plug. Therefore, when the mobile phone cannot be charged, it is necessary to check whether the interface at the bottom of the mobile phone is blocked by foreign bodies.
2. Replace the power cord, if there is no problem with the power port of the phone, it is likely to be a power cord problem! You can borrow someone else's phone power cord to charge it. If the charging speed is normal after changing the line, it means that there is a problem with the line, and the speed is on the milk tea east to buy the power cord.
3. Bugs in the system will lead to slow charging, which may sometimes be caused by the system, causing the phone to fail to charge. Rebooting solves 70% of phone problems.
4. Temperature problem, due to the physical characteristics of the battery, it is particularly sensitive to temperature, too high will cause problems, too low will lead to no charge. If you are in a place where the temperature is too low, please first put the phone in the bed or air-conditioned room, let the phone at a normal temperature, and then charge it.