I hope your luck holds with Spek. My experiences were not as rosy as yours. I do the MAH thing too- I do 4 or 5 flights, then charge and see what I put back in. I flew 2 days in 3 weeks, about 13 10+ minute flights and I put about 1000mah back in. 1800 mah pack, so by that theory I could have done another 4 flights with a 20% reserve.