Buy from Amazon.com : http://fave.co/1HuYxpb <br /><br />Canon BG-E4 Battery Grip for EOS 5D Digital SLR Camera (Retail Package)<br /><br />Product Description : <br />Canon Branded Retail Package <br />Compatible with up to two BP-511A battery packs or six AA batteries <br />Increases shooting capacity and convenience when traveling <br />Features an AEFE lock button AF point selector and more <br />Comfortable to use when the camera is held vertically