I've been using a Turnigy 2200mah 3s 30C battery.  I setup a down timer in my radio and I'm getting 4.5 minutes per flight.  This leaves the battery with a 20% charge left.  I get the same flight time using the same battery in my MiniTitan Helicopter with a Scorpion motor.

Here is the link to the video:

http://www.youtube.com/watch?v=DUSkna8YKtQ

JC