To resolve the issue, try the below:
1) Ensure that the voltage in the region you are using the adaptor is compatible with the working voltage of the adaptor.
2) Ensure that the output voltage of the adaptor is compatible with the device's required working voltage.
3) Ensure that the adaptor interface is compatible with the charging cable interface.
4) Ensure that the USB cable is properly connected and that the USB cable is not damaged.
5) Try using another adaptor to check if the problem is to do with the battery.
6) Ensure that the charging ports of the device and the charging cable are free from dirt and damage.
7) Ensure that the adaptor is compatible with your device's fast charging protocol. Some devices may use proprietary charging protocols and cannot be charged with third-party adaptors.
If the issue remains unresolved, we recommend taking your device to a service center for inspection.