I think your cell phone system is down,
1. Mobile phone system failure. First of all, there may be some system failure of your own mobile phone, which may lead to its battery power problems, if it is encountered in this case, then you can first turn off the phone and then re-open, which is equivalent to data refresh, and when the power is restored, it will be normal.
2, the charger failure. How can the mobile phone be charged, there is another possibility that the charger is faulty, if this is the case, you can try to use another charger to try, if it can be charged, then you can show that your charger is faulty, as long as it is replaced with a new charger.
3, the charger and mobile phone contact is poor. Sometimes it is careless when you use it, the charger is not plugged in, which may lead to the phone not being charged, therefore, if this is the case, you only need to unplug and reconnect, generally speaking, you can be charged.