JJC Rapid Flash Fire Recycling External Flash Battery Pack for Camera Speedlite Nikon SB-910, SB-900, SB-5000, Nissin Di866 Mark II (for Nikon), MG8000 (for Nikon) replaces Nikon SD-9 Works with a vast array of different flashes (including Canon, Nikon, Sony and Pentax)--just change the connecting cable for the correct flash Option to use 4 or 8 AA Alkaline, Lithium or Ni-MH batteries at a time Greatly increases the number of flashes and reducing recycling time With 1/4-20" screw to attach the battery pack to your camera bottom or other places Includes a carrying case ;Compact and lightweight