... of output, as follow(condition is connect to the load):A. Press tact switch for 2s, output power 98%, average output voltage ... 7.2V; LED display red.B. Press tact switch again, output power 70%, average output voltage 5V; LED display ... . 5. Electric indication: on the condition of unconnected to load, press switch, LED will display current battery electric quantity; release the button ...