the Elusion is a superior product. I've used the Elusion side-by-side to a cheap kit, they are much better. The batteries outlasted the cheap kit, and the carts. are easily refilled. The price is the issue: 2-3 times higher. 10 days to ship to the u.s., thats a bummer. I'm going through the Elusion posts, trying to find a adapter, clone or replacement battery for the high dollar Elusions. I will say that I bought a RN4081-510 adaptor, thinking it would allow me to use the Elusion cart. in a cheaper battery. Not close, the 510 is a fine thread, the rn4081 is a corse thread. Ø's are different, also