Hi Skye: Just wanted you to know that I use the MaxxFusion and the V4L Vapor king both. I prefer the Vapor kings because most KR808 batteries will fit, and on the Bloogs, the Bloog cartos fit well, but most other KR 808s do not. Since there are so many problems with Bloog cartos, you might want to wait until they get the problems ironed out before ordering the MaxxFFusion. I like other Kr 808 cartos and the V4L cartos are very good also--for those reasons, I prefer the V4L batteries, at this time. I have the MaxxFussion regular and shorty--threads are different on each, and neither one is compatible with many other KR808 cartos. (Never have known why different threads on the 2 batteries) Just my experience I wanted to share without any one jumping down my throat.
Gramva