Have the Telsa, not the Charon, though I do have the Battlestar. If the Charon is built as well as the Battlestar, both would be good. The biggest difference to me is do you want/need more than 120w, which the Tesla stops at. The steampunk design is love/hate (I love it) but the on/off switch is great for throwing it into pocket and the user option (in addition to the normal/soft/hard settings) is nice for customizing for different tanks.
I will say the Tesla is my everyday mod, Battlestar 2nd and the Alien 220w is now the backup backup. The Tesla feels as sturdy as my old MVP 3.0 (which is a brick), has had no issues (neither has the Battlestar, the Alien on the other hand ...) and fits my cleito 120 (25mm) perfectly.
I will say the Tesla is my everyday mod, Battlestar 2nd and the Alien 220w is now the backup backup. The Tesla feels as sturdy as my old MVP 3.0 (which is a brick), has had no issues (neither has the Battlestar, the Alien on the other hand ...) and fits my cleito 120 (25mm) perfectly.