... green LED’ 1pc tact switch; 1pc 3.6mm DC block, charge and discharge for the same port.2. ... 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; ... on the condition of unconnected to load, press switch, LED will display current battery electric quantity; release ...