what is the difference between 2 cell and 3 cell battery?
A 2-cell LiPo battery has the same relative voltage as a 6-cell NiMh or NiCad type battery that is 7.4 volts. ... They wind up giving you the same run time, but the 3 cell has a much higher voltage output to the motor, so you wind up with more overall power, or watts, than you would with a 2 cell.