Variable Voltage, what many refer to as “VV”, is a feature found in some advanced personal vaporizers that allow the user to manually adjust the voltage being provided to the atomizer (or cartomizer) heating coils.
Typically, the voltage circuit will allow for a range of voltages typically starting at 3.0 volts all the way up to 6.0 volts – this being the output for different variants in battery types and sizes. Some APV’s (advanced personal vaporizers) may have a boost circuit that will allow for higher voltages.
The advantage of a variable voltage device is that it allows the atomizer (or cartomizer) to be used at its optimum level (in terms of its output in watts) and so will give the user a greater range of control over throat hit and vapor production, according to the resistance of the heating coil and PG/VG ratio of the e-liquid being used.
Variable voltage devices can be used by users of all experience levels. The voltage can be adjusted to make the vapor stronger or weaker based on your preference.
Variable Voltage is used in many devices you see today, such as the LavaTube, Provari, ZMax, eVic and even the eGo-C Twist among many others.