Wadding: Another term to describe the filler material inside a cartridge which holds the juice.

Watt(s): Watts is a measurement of power which is the function of the voltage of your electronic cigarette or mod and the resistance of your atomizer or cartomizer. Watts = Voltage (squared) of your device divided by the resistance of your atomizer or cartomizer.

Wick: A wick is an absorbent material that is used in many different styles of atomizers. A type of poly or silica string or number of strings is often used for the wicking. (Wicking) also refers to the act of directing the e-liquid from the container to the heating element.

Wicking: The process by which e-liquid is drawn from the cartridge into the atomiser coil.