So, I'm about 2 months deep in the vaping world and so far, 48 hours of being completely cigarette free. I currently have 3 nautilus (5ml) tanks that operate off of a ZMAX Mini. I use the 1.8 BVC coils, and vape anywhere from 8-12 watts. I love my mini, but my only gripe is how often I have to change out the battery. I frequently chain vape, so I'm doing good if I get 2 hours out of each battery. I want a new battery but not sure what to go with. I'm debating an MVP, although I would prefer a pen style that takes rechargeable batteries. Also debating getting the full size ZMAX. What batteries do you guys/gals recommend for the Nautilus, and for what reasons? Any input anyone can give would be greatly appreciated! Thanks!