The
drag nano is decent. I haven't liked a lot of pods. Love the Ijoy Diamond vpc as I said on another thread because of size, power, versatility. It is more like a tiny
mod than a pod although it can use 3 different pods or any
tank with 510 connection.
It is vw, has internal batt but it can be changed. Fast charge and charge lasts a long time. Its only negative is if you drop it a few times, tends to knock the internal batt loose but it can be fixed by opening it and putting the battery back in place. Opening it is a bit of a pita, requires torx wrench.