We limit the use to a total of 16 Ahr battery capacity. Use it as you wish. Generally, that is used as a 1325 mAh 3s battery. But you could use a higher capacity 2 s or lower 4s. I have a Baby Flite Streak that flies just fine on a 3s 850 mAh pack.
My Baby Pathfinder needs the full capacity of 16 mAH.