idk, the minute i saw this mod i thought "why would i want to limit myself to proprietary batteries?" y'know? there's no question that as the years go on, these batteries are going to become harder and harder to find on any vape vendor's website... they'll go the way of the DCT tank, the Kanger T3 clearomizer are both going now, and eventually, they'll be as unobtainable as a Smoktech Redux Clearomizer, or a Kanger T2 Clearo. But, then I thought about the possibilities... They COULD come out with a 4000mah battery for this mod in the future.. Hell, they could come out with a 9000mah battery if they wanted. I have NO issues with that, that's pretty darn cool if u ask me. Use the huge battery at home, use the smaller batteries while out of the house, right? and, u know that the batteries will be around for the next year or two, and by then, we'll have halographic mods with light-saber attachments and you wont want to vape on this thing anymore anyway. It's definitely shnazzzy looking. I like your color choices. Congrats on the new mod. It's definitely a COOL choice for a main PV. Merry Xmas and Happy Holidays ^.^