There may be several reasons why the Bluetooth headphone charger cannot charge your phone.
First of all, the output voltage and current of the Bluetooth headphone charger may not be enough to meet the charging needs of the phone.
Secondly, the interface of the Bluetooth headset charger may not be compatible with the charging interface of the phone and cannot be connected correctly. In addition, the Bluetooth headset charger may only provide charging function for Bluetooth headphones, but not for other devices.
Finally, the Bluetooth headset charger itself may be faulty or damaged, resulting in an inability to properly charge the phone. If you want to charge your phone, it is recommended to use the phone's original charger or a compatible charger.
The charging power of the Bluetooth headset is small, that is, the charging current is too small, and the current is too small when charging the mobile phone, and it cannot be charged at all. There may also be a phenomenon of phone battery backflow. It just gets lower and lower