I guess I just expected to feel or hear the battery get lower and could not believe that it still had 11 volts or better in these packs. I am used to flying the GWS setup in my Corsair and it uses the Nimh Sanyo 8.4 V/ 730 mAh. You know when they start to wind down. I flew for an easy 20 minutes with the Kokams and the Outrunner at about 1/2 to 2/3 throttle and never heard or noticed any power loss. I guess I expected less and got more. About time...