From E-Cigarette Wiki
An E-Cigarette.
A: LED B: Battery/Circuitry
C: Atomizer D: Cartridge
An electronic cigarette (also known as an "e-cigarette" or “personal vaporizer”) is an alternative to smoked tobacco products, such as cigarettes, cigars, or pipes. It is a battery-powered device that provides inhaled doses of nicotine by delivering a vaporized propylene glycol/nicotine solution. In addition to nicotine delivery, it also provides a flavor and physical sensation similar to that of inhaled tobacco smoke, while no tobacco, smoke, or combustion is actually involved in its operation.
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