Replace the qualified charger.
For non-original chargers, it is easy to fail to charge. If the charger specification is not up to standard, replace it with a qualified charger.
Check data line
Please check whether the data cable is normal. The data cable looks normal on the outside, but it may be broken inside. The inspection method is to borrow someone else's data cable to see if it can be recharged.
Check the original charger.
Thirdly, check whether the original charger can work normally. You can connect the charger to another mobile phone with USB port to see if it works properly. Although not all chargers are suitable for iPhone, iPhone chargers are compatible with all USB phones.
Try to plug into the USB port of the computer.
If the above two things still don't charge after checking, please try to plug them into the USB port of the computer to see if the computer can recognize the mobile phone, and if so, see if it is charging. If it is approved without charge, it is estimated that it needs maintenance. If it cannot be identified and recharged, it must be repaired. If it can be identified and charged, please replace the data cable and charger with better quality.
Check voltage
See if the voltage is too low. If not, go to the maintenance station. Be careful not to confuse the pad with the power adapter of the mobile phone. The voltage is different.