Please check the output of the battery and confirm if your phone accepts the power accordingly:

USB output: 5V/1A

Type-C output: 5V/2.5A (max)

QC3.0 output (the blue port): 5V/2.4A; 9V/1.5A; 12V/1.35A

Kindly note the battery will shut up charging automatically when the charging output current is less than 200mAh, it makes the battery may not able to charge a Bluetooth earphone. 

If you have more concerns about our product, just feel free to contact us.