I'm looking at buying my third mod. My first two were a Wismec Predator and a smok T-Priv. I'm looking for something pocket friendly, lightweight, and nicely made. I think I have narrowed it down to three mods: Vapresso Revenger, eleaf Invoke, and the Smoant Charon. The thing that intrigues me about the Revenger and the Charon is the magnetic battery doors. I view this as a pro, but could it be a con? What are the pros and cons between the Vapresso Revenger, eleaf Invoke, and the Smoant Charon?