I know many of us get asked quite frequently "what is a mechanical mod" or "what is the defference between an electronic cigarette or APV vs. a mechanical mod" and in the beginning it can get confusing keeping up with all of the terminology and such so here is a fairly indepth mechanical mod article that breaks it down pretty much from soup to nuts. It explains the chemical make ups and differences in batteries and why it is important to know, different metals and their conductivity and how it all relates to cotact points and so on, and of course safe practices. I'm sure there are some things that it may have missed, but it is still a good reference for newbies or even vets just getting into mechanical mods.