The Aspire CF VV+ is high-end vaping power system. This battery features stainless steel endpoints, a metal button, and a carbon fiber coated tube. The Aspire CF VV+ battery contains a revolutionary spring connector. This unique technology ensures that there will always be a strong connection between the battery and e-cigarette tank. The structural design and control circuit of this battery series makes using it extremely reliable and stable. The CF VV+ battery realizes step less variation in 3.3V-4.8V output variable voltage. Rotate the rotary knob at the bottom of the battery to deliver the optimal voltage for vaping needs.