Product Introduction: 1.Intelligent electricity quantity display board;slightly push trigger switch,it will auto power off after 3 seconds display 2.Static power consumption 2.3MA,and it can be disregarded 3.Plug-in indicator light color:25% red,other 3 pcs are green 4.Application Fields:battery electricity quantity detecting;only needs to connect seperately battery's positive and negative with electricity quantity board's positive and negative;slightly push trigger switch,then it can be able to detect current electricity quantity.4 LEDs will divide battery comprehensive capacity into 4 phases;slightly push the switch,electricity quantity will be shown 1S: Display indication:25% first light is on(voltage:3.4V);50% second light is on (voltage:3.6V);75% third light is on (voltage:3.8V);100% fourth light is on (voltage:4V) 2S: Display indication:25% first light is on(voltage:6.6V);50% second light is on (voltage:7V);75% third light is on (voltage:7.5V);100% fourth light is on (voltage:8V) 3S: Display indication:25% first light is on(voltage:10.4V);50% second light is on (voltage:11V);75% third light is on (voltage:11.5V);100% fourth light is on (voltage:12.4V) 4S: Display indication:25% first light is on(voltage:13.8V);50% second light is on (voltage:14.5V);75% third light is on (voltage:15V);100% fourth light is on (voltage:16.2V) Package Included : 1 x 18650 Lithium Battery Capacity Indicator Tester LED Display Board Power Level Indicator Lithium Li-ion lipo Battery