If the Bluetooth headset cannot be charged, first check whether the charging cable is properly connected. If the connection is normal, you can try to replace the charging cable or replace the charger. At the same time, you also need to check whether the headset battery is aging or damaged, if this is the case, you need to replace the battery.
In addition, when charging, you need to put the headset in a dry and ventilated place to avoid overcharging or long charging, which will also affect the battery life. If the above methods do not work, it is recommended to contact after-sales service for help.