On the MM software it has a Lipo voltage cutoff option you can set it to. I read the manual and it says 9V is a must use for 3 cell lipos. If it cuts off at that, I wouldn't be getting much runtime. I think you not supposed to get it under 3V but someone educate me here. Maybe it's for both batteries? 22.2v = 9v divided by two batteries = 4.5v I don't know. What should I set it to?