Welcome to SmokShop's variable voltage and wattage page. Here you will find a selection of different styled VV and VW devices, most of which can do both. All of the above devices are essentially the same thing with a different shell, this allows each user to select the style of device to fit their need or in some cases fashion. Of the 8 we currently stock 4 have fixed internal rechargeable batteries where the other 4 take removable batteries which require you to buy a separate charger. Variable voltage and wattage mods are very well built using either heavy or light strong metals which makes them less prone to damage from knocks and bumps.