1,The switch of built-in battery myoelectric prostheses is round and all-steel,press the switch to open,press the switch again to close.
2,When charging, the switch is on off,turn off the prosthesis and take off (it can not be used  when  charging) placed in a safe and reliable place. 
3,Insert the charging plug into the the prosthesis charging socket,  (labeled "charging" mark), then insert the charger into the 220V 

power supply,the LED indicator lights is on; red light means charging the battery, the green light means that has been filled with.
4, After charging (shown in green light) disconnect charger and power supply firstly,and then pull out the charging plug.