Say hello to our trendy, powerful 400mAh Bottom Twist 510 vape pen. This product will be your go-to 510 battery from now on. This is a fun product that can be used anytime and anyplace. This variable voltage (3.3V-4.8V) battery has an easily accessible voltage selector, and the powerful preheat function ensures you're prepared no matter what you need. With seven beautiful finishes, you're sure to find the perfect Bottom Twist for you!