Every
vaping device has four basic components.
1. A Battery
Which provides power to:
2. A Coil
Which heats and vaporizes e-juice brought to it by:
3. A Wick
Which is kept wet by:
4. A Juice Reservoir
Of some sort (cartridge, tank, bottle, physical addition of more juice).
Now, all of these components can be varied in type, size, capacity, and ease of use; and can be combined and configured in different ways. But as far as I know, all vaping devices use some configuration of these four components to create vapor.
I hope that helps. This forum is a vast resource of vaping knowledge and experience, keep asking questions, for sure.