All personal vaporizers work in the same way with the same components. They consist of:

Battery or Other Power Source
Provides the power to vaporize the e-liquid

Houses the batteries and circuit board for higher functioning devices. This transfers power to the atomizer

Where the e-liquid is stored

Atomizer (Cartridge or Cartomizer)
Houses the coil(s) that are coated with e-liquid. These coils are heated to produce the vapor

A replaceable wire that is wound like a coil. Coils are “wicked” with cotton wadding

Cotton Wadding
Material that absorbs e-liquid

The vapor is delivered through this to the user