An e-cigarette, short for electronic cigarette, is a battery-powered device designed to simulate the sensation of smoking traditional tobacco cigarettes. It achieves this by heating a liquid (commonly referred to as e-liquid or vape juice) to produce an aerosol or vapor that the user inhales. Here’s a breakdown of key components and details:

Components:

1. Battery: Provides power to the device, often rechargeable.
2. Atomizer/Coil: Heats the e-liquid to produce vapor.
3. E-Liquid Tank/Pod: Holds the e-liquid, which typically contains nicotine, flavorings, and a base of propylene glycol (PG) and/or vegetable glycerin (VG).
4. Mouthpiece: The part where the user inhales the vapor.
5. Circuitry: Regulates the heating process.

Types of E-Cigarettes:

1. Cigalikes: Resemble traditional cigarettes in size and shape.
2. Vape Pens: Larger than cigalikes with longer battery life and refillable tanks.
3. Pod Systems: Compact, often using pre-filled or refillable pods.
4. Mods: Larger, customizable devices offering adjustable power, temperature control, and larger tanks.

How It Works:

The device heats the e-liquid without combustion, producing vapor instead of smoke. This process avoids many harmful byproducts of burning tobacco, such as tar and carbon monoxide, though it still delivers nicotine unless the e-liquid is nicotine-free.

Intended Use:

Initially marketed as a smoking cessation aid, e-cigarettes have become popular recreational devices. Public health organizations debate their safety and effectiveness as alternatives to smoking.