The way to do that is to replace the battery
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1, the headset does not use screws, just use the buckle combined with the front and back shell, use the disassembly rod to pry from the charging port.
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Just pry a loop and you can open it. 2, to change the battery, first determine the battery model, for this battery as long as you pay attention to a string of numbers on the battery. 3, remove the old battery, and then weld the new battery. 4, after installing the battery, do not install the shell, first boot test, no problem and then install the shell. You can see here that the blue LED has lit up. 5, it is ready to use after loading.
Bluetooth headset is not to use the battery as far as possible to change to the best battery, or after the battery is full do not use anytime and anywhere, the right amount of control of their own time.