The Kanger EVOD VV Twist 1600 mAh is a beautiful battery packed with features. Enjoy the flush mounted button and variable voltage functionality. In addition, the battery offers long lasting (all day) 1,600 mAh capcity and the matte finish is sweet! The EVOD VV Twist is a great device with variable voltage capability. The dial at the bottom of the device allows you to easily change your voltage while you vape. The device is slightly longer than normal eGo style batteries, and definitely looks great with a colored tank.