so, the more I read, the more i realize I dont know. Probably a stupid question, but if i'm gonna be using 4-8 watts to be powering my carts (or tanks or atomizers, which i'm learning are all kind of the same thing, the concentrate holding thingy?) what is the difference between the 25w and the 100w eleafs, or any "mod" for that matter? Is it related to how many times I can fire it at that watt before the battery runs out? I"m trying to read through some "vaping 101" websites right now and really go back to figuring it out on a 1st grade level. I saw that a lot of these are "sub ohm" and I dont know if thats something I need or not? My reading says thats where it gets risky because it will fire no matter what, whether it will destroy shit or not.