I flew it again today and timed the flight, I was getting 10 1/2 mins. on the 3 cell Kokam 700mah pack. I also flew a Thunder Power 2 cell 860 mah pack and got about the same flight time. I like the power of the Kokam better but I found the Thunder power pack was easier to hover. I guess because of weight and less torque to the motor. (The tail was not twisting as much)