Sub Ohm Tanks
Sub Ohm tanks are a subset of vape atomizers that fall below the 1ohm mark in terms of resistance. Many sub ohm tanks now have coils that measure around 0.1-0.3Ohm resistance.
The low resistance of a coil requires a higher wattage (and current) in order to heat the coils up quick enough. As a result a sub ohm tank is mostly always paired with a dual or higher battery external box mod. A single battery internal or external can also be used, but battery degradation is significantly more noticeable, leading to frustration and an increased risk of relapsing into smoking.
Sub Ohm Tanks also increasingly have mesh coils available - mesh coils tend to heat the cotton more evenly and with a quicker firing time. They can also contribute to better flavour, as seen with the Freemax Mesh Pro tank and Horizon Tank Falcon Tank.