The Exxus Plus VV vape pen is a push-button vaporizer with a little extra power. With a 380mAh battery, this push-button, eGo style, vape pen battery has enough power to vape almost any prefilled 510 thread cartridge. It has color-coded variable voltage power settings that range from 2.6 volts on the low end to 4.0 volts on the high end. If you need to preheat your prefilled 510 thread cartridge you can do so with their two-click (2), 10-second preheat function. The screw-in USB charger has an LED light indicator to let you know when the battery is charged and ready to go. If you want an entry-level push-button pen-style vape that has some extra battery capacity, then the Exxus Plus VV vape pen is what you buy.