ITEM NAME:12V Lithium BatteryCapacity Tester PanelElectric Power DisplayIndicator BoarSEAU 1Pc x12V Lithium Battery Capacity Tester Display Panel Electric Power Indicator Board.1Pc x12V Lithium Battery Capacity Tester Display Panel Electric Power Indicator Board. the light board line through the current is about 30mA. board with reverse connection function, and take the wrong line no problem.