It may be that there is a problem with the charging port or charging cable of the mobile WiFi and it needs to be replaced or repaired. It is also possible that the charger power is insufficient or the power socket is faulty, you can replace a more suitable charger or check the power socket. At the same time, it is recommended to use the original charger and charging cable to avoid the use of incompatible chargers or charging cables that lead to poor charging. If the above solutions are ineffective, it is recommended to send to a professional maintenance center for maintenance.
The charging port is broken. Go to the repair shop