I believe hobbywings and other brands default to 3.5v per cell. Its debatable what causes damage to cells and to what extent but in general its agreed that below 3.6 per cell is not ideal and above 8v for long period is not good either, and the farther away you are, the more damage done. 3.2v is too low by then you've already done some damage, could be a lot could be a little but definitely not in the safe zone.