Yeah, you will be fine. I had been using 1200 mah NiMH packs on my planes (5 cell packs) and just recently up'ed that with the new LiFe technology and 1800 mah. I would get, typically, 5 flights out of those 1200 mah packs and I was very conservative about my flying. After 5 flights, the pack would go on a charger.

CGr.