Variable Wattage/Voltage
Regulated mods are box or tube style mods that allow you to customize your vape experience. Most regulated devices are variable voltage and/or wattage, some even have the ability to control the temperature of your vape.
Dual battery devices will give you the best battery life, and offer the highest wattage settings, whereas single battery devices can be run at lower wattages for a somewhat cooler vape, in turn saving your battery life.