Mike I am using a Zippy 1800mah 3s 9.9v life that was designed for TX from Hobby King. I call fly 3 to 4 times in one day and it might use at the most 200 to 400 milliamps on recharge. They are very inexpensive and I have 4 of them that have never given me a single problem.
I know I have flown more that 6 flights before recharging and it still had plenty left.
I just rotate them out along with my 2100mah 9.9v life for turbine at the same time with batteries that are fully charged.
Now I am using the Down and Lock controller but I am sure they draw about the same.