It's true, for a regulated VV/VW mod you want to use high-drain batteries. These are IMR (Li-Mn) or hybrid chemistry batteries, not the protected ICR (Li-Ion) batteries.
Why High Drain Batteries?
The above Panasonic NCR18650B 3400 mAh and the Panasonic NCR 18650A 3100 mAh batteries are NOT high-drain batteries. They are a hybrid battery whose chemistry is so heavily weighted toward the ICR side that they are pratically speaking ICR batteries. These were designed for low drain applications such as flashlights, not advanced personal vaporizors.
The Panasonic
NCR18650PF 2900 mAh or
NCR18650PD 2900 mAh batteries are the top rated high-drain battery for an regulated VV/VW mod.
Battery Basics for Mods: IMR or Protected ICR?
Deeper Understanding of Mod Batteries
Buy the best charger that you can afford from either Pila, Xtar, or Nitecore. Statistically, most battery incidents happen while charging on a box charger, so don't skimp on a cheap charger.