Understanding Lipos more important. Doesnt matter to a racer or Basher. Earier when lipos are out with the Airplanes. Minimum voltage was 2.8-3.0v, you were fine. Now a days you ESC cut out set to 3.2v. Way before 2.8-3.0v. New charger now have more brains than any of us RC'er!!! Stop when its is safe charging, discharging, and storage. It stops at the beginning #of cells, and voltage. View do's and don'tt of lipos.