Quite a while ago I mentioned that I thought the Dart transferred heat to the battery too easily and that I thought it would benefit from some kind of insulating adapter... well, I found one:
It's called a
"Gripper" 510 Extension which is meant for an ecig called the Gripper but it works wonderfully in this application: faster warm-up, increased performance, and zero battery heat transfer. Seriously.
I can feel the waves of heat hitting my face as the rev produces fantastic clouds but the heat never makes it more than halfway down the extension so the battery (persei in this case) stays nice and cool even after minutes of continuous use.
I don't measure any resistance and the quality is better than I was expecting but who knows if the center contact is nice and thick or just a thin piece of wire... good thing it's pretty cheap.
IMO this is a must for any high-tolerance user who is not always satisfied with the dart, it really makes this system produce clouds much more reliably, enjoy!