Save yourself the struggle of arriving at the field with empty batteries and protect them from undercharging during the game.
It shows you how much each cell is charged for your lipo battery.
With the screen facing you, you need to plug the connector of the battery on the left side of the device for it to work.
To see the charging state of your battery in terms of %, click here for the charging table.
Pins can be damaged if used incorrectly.