4S Lipo Battery Voltage Display Indicator Board Description This item is used to test the single cell lipo battery voltage just need to connect the battery positive negative electrode to the B B of the board The total capacity of the battery is divided into four segments by the 4 LED indicators Touch the button the corresponding battery indicator is lit and goes off after 3 seconds Specification Item Name Lipo Battery Voltage DisplayDimension 40x13 5x3 5mmUsage Used to test the 4s lipo battery Package Included 10x Lipo battery voltage test board