For the Intermediate Vaper. When the standard battery just isn't enough anymore, and you are looking for the "something extra", it's time to move up to a Mod. These devices use internal batteries that we removed to re-charge. There are variable voltage (VV) and variable wattage (VW) devices in this category. VV and VW will allow you to change the amount of energy going to the atomizer. It can create different flavors, alter vapor production and temperature of your vape.
You want to make sure to work your voltage/wattage WITH your ohms resistance. General rule is ohm x 2 = voltage. Example: you have a 2.2 ohm coil in your tank. You want to run your voltage around 4.4.