JJC BP-CA1 External Flash Battery Pack For Canon 600EX-RT / 580EX II / 430EZ / MR-14EX / MT-24EX Nissin Di866 / Di866 Mark II for Canon / MG8000 for Canon YONGNUO YN-560II / YN600EX-RT / YN560IV JJC BP-CA1 battery pack 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. Replaces Canon CP-E4, for Canon 600EX II-RT /600EX-RT / 580EX II / 580EX / 550EX / 540EZ / 430EZ / MR-14EX / MT-24EX