As I was trying to figure out what kind of mod I would like, I realized that any mod I get will need a battery charger, and that since I might buy more than one mod, or want to use more than one kind of battery for any reason, I would want one good battery charger that would handle essentially anything. Also, apparently battery length varies, usually because protected batteries need a little more room. So I want to be sure to get a charger that can deal with that. Some battery types I would want to be sure it could charge since they seem to be popular. 18650 batteries. 16340 batteries. 15270 batteries. 14500 batteries. 10440 batteries. rcr123a batteries. others? The battery charger that sounds like the best is the one sold with the Provari. Best Rechargeable Battery Chargers: Pila Battery Charger & Pila Charger Is there anything wrong with that one? Anything better? Anything comparable but cheaper? Just looking for opinions from those of you who have experience. I don't know anything about that sort of thing other than what I've recently read. I heard something about spacers, and I don't know if I'll need them, or if that's something I should plan to order separate. Being able to safely leave batteries in the charger when I'm asleep or away from home would be nice, and I don't think all chargers can handle that. And while I'm asking, what's considered the best battery combo for a VV or higher voltage system? Looking for long "away from home" times before needing to swap batteries and such. Should ability to use the "best batteries" figure into what mod I should consider?