Neewer? External Flashgun Battery Pack for Canon 580EX 580EX II 550EX MR-14EX MT-24EX Speedlite
Product Description : This is a great addition to any professional or amateur photographers camera kit This external power source is designed for use with Canon 580EX 580EX II 550EX MR-14EX MT-24EX flash The pack has a tripod screw so that it can be screwed into the tripod thread of the camera Convenient design you can either use 4 or 8 AA batteries It will be faster recharged when using 8 AA batteries This flash battery pack uses a new trigger method its almost no power consumption under the stand-by mode
