

An electronic cigarette, e-cigarette or vaporize cigarette, is a battery-powered device that provides inhaled doses of nicotine or non-nicotine vaporized solution. It is an alternative to smoked tobacco products, such as cigarettes, cigars, or pipes. In addition to purported nicotine delivery, this vapor also provides a flavor and physical sensation similar to that of inhaled tobacco smoke, while no cigarette's smoke or combustion is actually involved in its operation.
Basically electronic cigarette consist of 3 main parts: a battery, a nicotine cartridge and an atomizer.
Atomizer is the heating element serves to vaporize the liquid in the mouthpiece so that it can be inhaled. The atomizer is activated when the user takes a drag on the device.
The latest technology is modern 2-part design, what means that an atomizer and pre-filled disposable component are combined to a "cartomizer".
The batteries are typically lithium ion rechargeable that are powerful and compact. The batteries also contain some additional circuitry for lighting the tip that simulates the glowing "cherry" like that of a real cigarette.
The nicotine cartridge includes a mouthpiece and a reservoir for the nicotine solution. The cartridges can be purchased in various flavors (tobacco, menthol, cherry, vanilla, etc.) and levels of nicotine (zero, low, medium, high).
The nicotine solution in the cartridge mainly consists of water and propylene glycol which is a substance used in medicines, cosmetics, food, toothpaste etc. The only other ingredients include some flavoring and nicotine of course.
The 2-piece type of electronic cigarette is a little different in its design, but the principle of operation is the same.
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