What is a vape pen? It's a slim, battery-powered device that heats cannabis oil, or in some models ground flower, until it turns into vapor you can inhale. Many cannabis vape pens pair a rechargeable battery with a prefilled oil cartridge. Here's how the parts fit together, how to switch one on and what to expect the first time.
What is a vape pen?
Named for its pen-like shape, a vape pen is easy to carry and simple to use. Many are cartridge pens: a battery plus a cartridge of cannabis oil. All-in-one pens combine both in a single unit you use until it's empty. Dry-herb vaporizers and dab pens look similar but work differently.
Parts of a vape pen: mouthpiece, cartridge, atomizer, button and battery
- Mouthpiece: the tip you inhale from.
- Cartridge or tank: holds the oil; prefilled cartridges come sealed.
- Atomizer: the heating element, usually a coil or ceramic core.
- Button: found on button-activated pens only.
- Battery: the rechargeable power source, often with an indicator light.
How do vape pens work? Heat turns oil into vapor without burning it
Press the button or inhale, and the battery powers the atomizer, which warms the oil until its cannabinoids and terpenes turn to vapor, with no flame and no burning. If your battery has heat settings, start low: cooler settings feel gentler, hotter ones make bigger, harsher puffs.
How to turn on a vape pen: button clicks versus draw-activated pens
On many button batteries, five quick clicks turns the power on or off, and a few clicks in a row may change the heat setting. Patterns vary by brand, so check the instructions. Draw-activated pens have no button; a sensor starts heating as soon as you inhale.
How to use a vape pen with an oil cartridge, step by step
- Charge the battery fully.
- Screw the cartridge on gently; snug is enough.
- Turn the battery on if it has a button.
- Inhale slowly for two or three seconds, holding the button if there is one.
- Take one short puff, then wait at least 15 minutes; inhaled THC can take up to half an hour to peak.
- Store the pen upright, away from heat.
Clogs and leaks happen; our guide to vape care shows how to prevent them.
Dry-herb vaporizers: a different device
A dry-herb vaporizer heats ground flower in a small oven without burning it, and lab tests show temperature-controlled electric models efficiently convert THCA to THC. Vapor can hit harder than smoke: in a Johns Hopkins study of infrequent users, vaporized cannabis produced stronger effects and higher blood THC than smoking the same dose. Our cannabis vaping guide covers vaporizers in depth.
Why people choose vapes: portability, less odor, simple portions
- Portability: no lighter or papers needed.
- Less odor: vapor tends to fade faster than smoke, though it isn't scent-free.
- Simple portions: you control the length and number of puffs. A puff isn't a measured dose, so the label's THC figure is your guide to strength.
Vaping still carries risks. A 2019 outbreak of serious lung injuries, with more than 2,800 hospitalizations or deaths, was strongly linked to vitamin E acetate in some THC vapes. At the time, the CDC and FDA recommended that people not use THC vaping products, particularly ones from informal sources such as friends, family or dealers.
Vape pens versus dab pens
A vape pen uses a prefilled oil cartridge, while a dab pen has an open chamber you load by hand with solid concentrate, such as wax or shatter. Concentrates are far stronger than flower, so dab pens suit experienced consumers. Our guide to dab pens explains how they work, and our THC vape buying guide helps you choose a cartridge. When you're ready, browse vapes on your store's menu; vaping is for adults 21 and older, so please use it responsibly.
