Useful board for charging 1S batteries. The serial charging board is used to safely charge multiple batteries at the same time. Plug the board into the charger like a classic Lipo battery, then you plug the individual 1S batteries into the board. Using the jumper, you then set how many batteries you have connected to the board (how many cells the resulting battery has). Then charge the batteries by using the balance program according to the cells (the number connected to the battery).