So I am new to vaping but I have been doing a lot of research even before I began...right now I just have the basic 808-d batteries and am thinking about getting either an iTaste MVP or a Billet Box (when they actually get more in stock). Personally I wanted something that is low maintenance and is going to last for at least two years or more. So, what I'm getting at is whether or not it is worth investing in replacing batteries or not, etc. I know this is long winded but which is the best for someone who ants some things that mods offer but not the full time commitment, if that makes sense. Also in the Billet Box is there caution that should be taken because of the two batteries instead of one? Thnx