Just been chatting to the blokes with the vaders and purchased Turnigy nano-tech 8400mah 3S 40~80C!!! if you hover over them for a while they offer you a discount!!! will just need to put some deans on them when they arrive, Another chap with the vader was having same issues with cutting out and he had faulty battery which I think was my problem, purchased one of them second hand, that will teach me!!!