I've been in two co ops that included accessories so I have a lot of batteries. I'm very committed to eRoll. I get then charged up loaded and take two battery cases with me or keep them around at the house. A pocket full or zipper part of my purse full or handful ( ha ha yes, I clutch 3 at a time and rotate their puff turns.) when I vape I vape a pretty strong session and the first few drags are it and then on to a cool one. I think thee is an advantage in that my rotation will make it so everything lasts as long as it would if I bought a kit, used til it died and bought a kit used it til it died and so on. I do use my other stuff but even at home I need some eRoll time. They just have that edge over my big seet ups. And it's the Auto function that has me tricked into thinking they are best! I have the vapor Zeus now because its auto. Working on finding best carto or delivery device for it.
I can't bring myself to carry 3 fully assembled eRolls around with me, but I have to commend you for dealing with my only big complaint about the eRoll: this thing gets HOT. I was attracted to it because people in reviews say "It works out perfectly if you use it like you used to use a cigarette: take it out of the PCC, take a few puffs for a couple minutes, and throw it back in the charger." Well, I can vape with it for maybe 20 seconds before it gets so hot that I have to hold it all the way near the lit end. I guess all the Vamo, Lavatubes and tanks at home have me spoiled.
I'm worried that this will lead me to shelving the eRoll and going back to carrying an Ego-sized battery, but I'm trying to tough it out because I LOVE the form factor of this thing. A lot.