I'm using a 3300 mah battery, but have not done a full flight yet, so I can't say how much I'm pulling.  If it's
like my other planes with the AXI, then I would estimate about 2200 out of the pack for a 5min 20 second
flight.
 
Hi Robert,

Since you will only be pulling about 2200 out of the pack, I have a suggestion that might help. Why don't you use a 3000 MAH which will only weigh about 12 oz. then you should not have to add any tail weight and you still have plenty of head room in the battery.

I am using a 3300 right now on my electrics that I converted to electric and have to move the battery back to give me the tail weight I like to fly with. Rather than buying new batteries now, I am waiting for the spring to buy the 3000's since I won't be doing much flying in the winter and they would only go to waste. Then I really plan on putting in some flying time. I am also getting 5:20 on my flights.

Hobby King has the 3000 MAH Turnigy for $21 and change. Probably $30 shipped. My friend and I are using this brand of battery and they seem fine. Hope this helps.

Ron Heckler
Queens New York