Hey guys! I was looking for a normal pen-style battery that doesn't block the cartridges' airflow (for example King Pens). I tried to use a cartridge with my Vaporesso Revenger X but if I screw them in then the airflow of the cartridges is very restricted and I don't get the big hits that I'm looking for. The same thing happened with this battery that I bought. Either I partially unscrew the cartridge and it becomes unstable or I won't be able to properly hit it. Now I started wondering, does this happen with every battery? Or is it a compatibility problem? I was looking into the Yocan Evolve or the Vision Spinner (recommended on r/oilpen ). Can anyone confirm that this battery doesn't restrict the airflow or doesn't burn the cartridges (I couldn't find the voltage of this pen online, but I read somewhere that it might be too powerful). Thank you all for the help! Also, as I'm based in UK/Europe, please don't recommend me pens that are almost impossible to get here. I usually buy these things from FastTech!