An extract on #joyetech
There are three main types of e-cigarettes: cigalikes, looking like cigarettes; eGos, bigger than cigalikes with refillable liquid tanks; and mods, assembled from basic parts or by altering existing products. As the e-cigarette industry continues to evolve, new products are quickly developed and brought to market. First generation e-cigarettes tend to look like tobacco cigarettes and so are called "cigalikes". Most cigalikes look like cigarettes but there is some variation in size. Second generation devices are larger overall and look less like tobacco cigarettes. Third generation devices include mechanical mods and variable voltage devices. The fourth generation includes Sub ohm tanks and temperature control devices. The power source is the biggest component of an e-cigarette, which is frequently a rechargeable lithium-ion battery.
An e-cigarette is a handheld battery-powered vaporizer that simulates smoking, but without tobacco combustion. Once the user inhales, the airflow activates the pressure sensor, and then the heating element atomizes the liquid solution. Most devices have a manual push-button switch to turn them on or off. E-cigarettes do not turn on by trying to "light" the device with a flame. The e-liquid reaches a temperature of roughly 100-250 C within a chamber to create an aerosolized vapor. However, variable voltage devices can raise the temperature. A glycerin-only liquid vaporizes at a higher temperature than a propylene glycol-glycerin liquid. Rather than cigarette smoke, the user inhales an aerosol, commonly but inaccurately called vapor. E-cigarettes do not create vapor between puffs.
Vaping is different than tobacco smoking, but there are some similarities with their behavioral habits, including the hand-to-mouth action and a vapor that looks like cigarette smoke. E-cigarettes provide a flavor and feel similar to smoking. A noticeable difference between the traditional cigarette and the e-cigarette is sense of touch. A traditional cigarette is smooth and light but an e-cigarette is rigid, cold and slightly heavier. Since e-cigarettes are more complex than traditional cigarettes, a learning curve is needed to use them correctly.
Compared to traditional cigarettes, the general e-cigarette puff time is much longer, and requires a more forceful suction than a regular cigarette. The volume of vapor created by e-cigarette devices in 2012 declined with vaping. Thus, to create the same volume of vapor increasing puff force is needed. Later-generation e-cigarettes with concentrated nicotine liquids may deliver nicotine at levels similar to traditional cigarettes. Many e-cigarette versions include a voltage potentiometer to adjust the volume of vapor created. The amount of vapor produced is controlled by the power from the battery, which has led some users to adjust their devices to increase battery power.