What is the maximum battery weight for 30 raptor and for a Vigor? I was going to get some battery packs made at the local Interstate battery sore and they have much to choose from. I was thinking 1500mah NIMH SIZE AA , or sub c size nicads or the 5/4 aa NIMH 4000mah. Any Thoughts? The two Heli's I bought did not come with battery packs.