I fly 4s, using a 5000 mah pack, I get appx 12 minutes carrying the H3-3D, video downlink, and 2.4 Datalink on a Hexacopter with the e300 system.
I tested it with 3s, and it flew, but I could tell it didn't have the power, and the flight times were horrible..
I have a buddy with the flamewheel...