The ego tye A and B will work on the ego battery. The only difference is that the type A is cone shaped and holds a smaller amount of juice and the type B is cylinder shaped and holds a larger amount of juice. Which ever you choose you will have to get the tank carts to fit that particular atomizer as they are not interchangable. I have both and I would recomend the type B. They seem to work a lot better and produce more vape and the draw is a lot easier.