An e-cigarette is a method that mimics the way a conventional cigarette works. It can emit puffs of nicotine-containing vaporized liquids. Compared to the typical cigarette smoke, this is a healthier alternative. E-cigarettes come in different designs and sizes, but you'll generally see them in the form of tubes and pipes. There are three key components of an e-cig: the inhaler, the atomizer, and the battery. These components can be assembled and disassembled at will so that, if you like, you can move stuff around and update some parts.