Welcome and CONGRATS!!! I use V4L and it is an 808 battery. Pretty much any carto that has 808 in its description will fit. You can use any carto from any company that carries that style, BUT, I will say that if you sign up for the V4L newletter, you will get some pretty awsome sales that other companies just cant beat.
My suggestion is if you get carto's from other sources, just get a 5 pack to see if you like them. I have used from 4 other companies and some burn hotter on my batteries... thus burnt carto taste...
There is a V4L forum here...
Vapor4Life and you can get a good run down on thier products...
And get ready..... deep breath..... you may soon be dripping and drooling over new equipment!!!
Again, congrats and Welcome to your NEW LIFE!!!