tanks and temperature control devices. The voltage for first-generation e-cigarettes is about 3.7 and second-generation e-cigarettes can be adjusted from 3 V to 6 V, while more recent devices can go up to 8 V. The latest generation of e-cigarettes are pod mods, which provide higher levels of nicotine than regular e-cigarettes through the production of aerosolized protonated nicotine.

E-liquid is the mixture used in vapor products