If you’ve ever wondered what actually happens inside a vape when you take a puff, the basic idea is fairly simple.
A vape uses a battery to power a heating element, which heats e-liquid held in a pod or tank. The e-liquid is then turned into an aerosol that travels through the mouthpiece.
While different devices can look and work slightly differently, most follow the same basic process.
How Does a Vape Work?
Here’s what happens when a vape is activated:
- Activation
Depending on the device, it may activate when you press a button or simply inhale through the mouthpiece.
- Power From the Battery
The battery sends electricity to the heating element inside the device.
Think of the battery as the power source that makes the whole process possible.
- The Coil Heats Up
The heating element, commonly called a coil, heats up when it receives power from the battery.
The coil sits close to a wicking material that has absorbed e-liquid.
- E-Liquid Is Heated
As the coil gets hot, it heats the e-liquid held by the wick. This creates an aerosol that can be inhaled.
- The Aerosol Travels Through the Device
The aerosol moves through the internal airflow path and reaches the mouthpiece.
- You Take a Puff
You inhale through the mouthpiece, drawing the aerosol into your mouth and, depending on your inhalation style, your lungs.
- You Exhale
After inhaling, you breathe out. The visible cloud or mist comes from the aerosol produced by the device.
What Are the Main Types of Vape Devices?
There are many different devices available, but they generally fall into a few main categories.
Pods and Vape Pens
Pod systems and vape pens are typically small, lightweight and straightforward to use.
A pod can contain the e-liquid, wick and coil, while the rechargeable battery supplies the power needed to heat it.
Some devices activate automatically when you inhale, while others use a button. More advanced pod systems may also include features such as adjustable power or battery indicators.
Their compact size makes them a popular choice for people looking for something simple and portable.
Vape Mods
Mods are generally more advanced devices designed to give experienced users greater control.
Depending on the model, they may offer features such as:
- Adjustable wattage
- Variable voltage
- Temperature control
- Digital displays
- Adjustable airflow
- Compatibility with different tanks and coils
Because they can operate at higher power levels, mods can produce considerably more aerosol than simpler pod devices.
Cig-a-Likes
Cig-a-likes are designed to resemble traditional cigarettes.
They typically contain a small battery, cartridge and heating element and are activated by taking a draw.
Their simple design makes them relatively straightforward, with few controls or adjustments.
Disposable Devices
Single-use disposable vapes were previously another common type of device in the UK.
However, single-use vapes have been banned from sale in the UK since 1 June 2025. Businesses cannot legally sell or supply them.
Rechargeable and reusable devices remain available.
Vape Kits
A vape kit is usually sold as a package containing the main components needed to use the device.
Depending on the kit, this can include:
- The device
- A pod or tank
- One or more coils
- A charging cable
- Other accessories
The exact contents vary between models.
What Are the Main Parts of a Vape?
Although devices vary in design, most vaping systems rely on several key components.
Battery
The battery provides the electrical power needed to heat the coil.
Some devices have a built-in rechargeable battery, while others use removable batteries.
Built-in batteries are charged while inside the device, whereas removable batteries can be taken out and charged separately using suitable equipment.
Atomiser
The atomiser is the part of the device responsible for heating the e-liquid.
It contains the heating element and works with the wick to turn e-liquid into an aerosol.
In everyday vaping conversations, you’ll often hear people refer to the coil rather than the entire atomiser.
E-Liquid
E-liquid, sometimes called vape juice, is the liquid that is heated by the coil.
Depending on the product, it can contain:
- Propylene glycol (PG)
- Vegetable glycerine (VG)
- Flavourings
- Nicotine
Some e-liquids are also available without nicotine.
Nicotine is an addictive substance, and vaping products are not risk-free.
Pod or Tank
The pod or tank stores the e-liquid.
Pods are commonly found on smaller, more compact devices. Tanks are generally associated with larger devices and can often hold more e-liquid.
Depending on the design, pods can be either pre-filled or refillable.
Coil
The coil is the heating element that warms the e-liquid.
It works together with the wicking material. When the device is activated, the coil heats up and produces the aerosol that is inhaled.
Coils are available in different resistance levels and designs, depending on the device.
Mouthpiece
The mouthpiece, sometimes called a drip tip, is the part you inhale through.
Its shape and size vary depending on the device.
Wicking Material
The wick absorbs e-liquid and keeps it in contact with the coil.
When the coil heats up, the e-liquid held by the wick is heated and converted into an aerosol.
How All the Parts Work Together
The easiest way to understand a vape is to think of the components as a chain:
Battery → Coil → E-Liquid + Wick → Aerosol → Mouthpiece
The battery provides the power, the coil produces heat, the wick supplies e-liquid to the coil, and the resulting aerosol travels through the device before being inhaled.
That’s the basic principle behind most vaping devices, even though their designs and features can vary considerably.
Final Thoughts
So, how do vapes work?
At its simplest, a vape uses electrical power from a battery to heat e-liquid using a coil. The heated liquid produces an aerosol, which travels through the device and is inhaled through the mouthpiece.
Different devices can offer very different experiences, from simple pod systems to more advanced kits with adjustable settings. Understanding the basic components makes it much easier to see how they all fit together.
Please remember that vaping products containing nicotine are intended for adults and are not risk-free. Nicotine is addictive.