Battery Management System Controls 97 Figure 7 Imbalanced cells. In this game, we see that the water levels have been exaggerated greatly in order to facilitate the game. However, the result is clear. When you begin filling the glasses through the funnel (rule 1), the last glass will get filled compared to the top first (rule 2). Now you can see that the other two glasses still have plenty of room in them and in fact the first glass is not even close to being full ( Figure 8 ). Figure 8 Effect of imbalanced cells at full charge.