It means that the power of the charging box is basically out of power after charging the Bluetooth headset for four times, at this time, you need to charge the charging box....
The charging box can charge the Bluetooth headset for about four times. What does it mean that it cannot be charged after four times?
It means that the power of the charging box is basically out of power after charging the Bluetooth headset for four times, at this time, you need to charge the charging box.
