Cartomizers and Clearomizers are just tanks for holding your ejuice.
Cartomizers
Cartomizers contain the heating coil (atomizer) and the cartridge in one unit. If you remove the rubber tip of a cartomizer and look inside, you can see the filler material wrapped around a tube. The heating coils are inside the tube. Cartimizers are generally larger than a clearomizer and hold more eliquid. Here is a photo of a cartimizer:

Clearomizers
Clearomizers are are usually smaller (holds 1.6 ml of ejuice) than a cartomizer and have a disposable wick that can be easily changed. Clearomizers do not contain the filler material, they have a metal tube that runs up the middle of the tank and the heating coil can be at the bottom or top of the tank. Here is a photo of a clearomizer:
To change the coil in a clearomizer:
- Unscrew the coil from the tank
- Hold the clearomizer at an angle.
- Fill the outer chamber with about 1.6ml of eLiquid (Do not pour eLiquid into the center tube, as it is for airflow )
- Reattach the coil.
For best results wait a couple of minutes for the E-Liquid to fill into to the coil before vaping.
You can also hit on the tank 5-6 times with out the battery attached to “prime the coil”. This will help to get your eliquid into the coil and prevent you from getting the nasty metal tasting
