Fotodiox Pro Turbopack 9000 Kit - DC 12v Power Pack with B4 2/3" 12-pin Hirose Power Cable for Fujinon, Nikon, Canon, Angenieux, Schneider Lens Servo Provides power to the Zoom Servo Functions including Quick Zoom, Cruise Zoom & Memory Functions Switchable DC Output to suit your lens needs: 12v, 16v or 19v Battery does not have a sleep function, so the lens will always be ready to go at a moments notice Built-in power indicator lets you know when the battery needs a recharge 24 Month Manufacturer Warranty