Alright. So my friend is going to buy a new e-cig. And told me he'd me his old one since I have been needing to get one for some time now. But he got his custom at this placed called "Totally Wicked". He's got the extended battery and the cartomizer that doesn't have the strings. But what I wanted to know is what type of cartomizer's produce more of a vapor? I couldn't find a solid answer somewhere. But I take it that most of the attachments you buy for e-cig's are adaptable to eachother, since his ecig battery went onto my mother's e cig, yet they bought them from totally different retailers. And my last question is, do most e-cig parts connect to other ones? or is there like separate models that only fit together when you mix and match that company's parts.