I am building a Kangke Laser 2000 right now with a DA-50 and need help with what batteries to use. Here is what else I have in my plane first of all. I am running 5 Hitec HS-5945MG, 1 HS-5925MG, I4C isolator, and an electro dynamic fiber optic switch for the ignition. I really do not want to spend the money for the lithium ion batteries also because my plane is tail heavy and I need some weight up front. I am thinking about going with Nickel Metal Hydride batteries. I was wondering what everyone thinks and what sizes I should get etc. I usually fly about 4-6 flights when I fly at about 15 min a flight. Thanks for your help. It is greatly appreciated.