Battery Level Module 11.1-12.6V

From the shop's description

High current protection board. Very low idle current consumption. Battery type electricity quantity display. Wide application fields lithium battery. Using Method, connect display board positive and negative port with tested battery positive and negative port,digital tube will display real-time battery electricity quantity. Digital Color, outline red, display block blue (when battery electricity quantity is full,it will be all on). Protection board with overcharge protection, over-discharge protection, over-current protection, short circuit protection. 3S 3 Series Lithium Battery Capacity Indicator Module 12.6V Green Display Electric Vehicle Battery Power Tester Li-po Li-ion. S 12.6V Lithium Battery Capacity Indicator Module 3 Series Blue Display Electric Storage Battery Power Tester Meter Lipo Li-ion.