Buy from Amazon.com : http://fave.co/1I03tWK <br /><br />Neewer? External Flashgun Battery Pack for Canon 580EX 580EX II 550EX MR-14EX MT-24EX Speedlite<br /><br />Product Description : <br />This is a great addition to any professional or amateur photographers camera kit <br />This external power source is designed for use with Canon 580EX 580EX II 550EX MR-14EX MT-24EX flash <br />The pack has a tripod screw so that it can be screwed into the tripod thread of the camera <br />Convenient design you can either use 4 or 8 AA batteries It will be faster recharged when using 8 AA batteries <br />This flash battery pack uses a new trigger method its almost no power consumption under the stand-by mode
