Electronic cigarettes use electricity, as their name implies, to vaporize a nicotine solution into water vapor that is then inhaled just like the smoke from a tobacco cigarette. The only difference is you’re not actually inhaling smoke, but water vapor mixed with nicotine and flavorings.
There are three Main parts to an electronic cigarette, the battery, the atomizer and the cartridge. Most batteries have a small LED at the tip that lights up when you take a drag very similar to the way the embers on a tobacco cigarette glow when you drag. This helps you know that you’re battery is charged and also stimulates a real cigarette in case you’re trying to smoke incognito.
The battery is the largest part of the device and goes where the tobacco is on a regular cigarette and is about the same size as that.
The next piece of the atomizer, which is the workhorse of the electronic cigarette and is responsible for vaporizing the nicotine solution. I’m not a scientist so the inner workings of the atomizer are beyond my knowledge, but I do know it’s powered by the battery and I believe it basically keeps up the nicotine solution until it evaporates into a vapor. Once I the atomizer has a small metal wick that absorbs the nicotine solution from the cartridge. The atomizer has threads like a screw and screws into the battery or vice versa.
The cartridge side of the atomizer is a bare metal sleeve over which the cartridge slides. The cartridge is about the size of the filter on a tobacco cigarette and is located in the same place. You simply slide the open end of the cartridge over the metal sleeve on the atomizer and, when screwed onto the battery, your device is completely assembled.
The small metal Wick on the atomizer sticks out a little bit into the cartridge and makes contact with a small fabric filler that holds the nicotine solution inside the cartridge. The nicotine solution works its way up the little metal Wick in the atomizer and when you take a drag a pressure switch turns on the battery, sending current to the atomizer. At that point the atomizer heats up and vaporizes the small amount of nicotine solution on the wick, which you then inhale.
When you exhale, a small amount of vapor comes out and completely dissipates in a few seconds. The vapor, before and after you inhale it, has very little smell to it at all, which is why you’re able to smoke indoors and, in fact right next to someone, without them even knowing. Also, because the vapor dissipates so quickly you don’t have to worry about living in a cloud of smoke like you do when smoking a tobacco cigarette indoors.