Amazon.com: mcoplus BG-550D Vertical Battery Grip as BG-E8 Replacement for Canon EOS 550D 600D 650D 700D Rebel T2i T3i T4i T5i DSLR Camera, Hold LP-E8 or AA Battery : Electronics
Opteka BG-E8 Replacement Vertical Battery Grip With Sure Grip Technology (4516B001) For the Canon EOS Rebel T2i, T3i, T4i and T5i DSLR cameras Includes Bonus 47stphoto Microfiber Cloth - Walmart.com
Canon EOS 550D (Rebel T2i / Kiss X4 Digital) In-depth review: Digital Photography Review