Includes TWO LP-E8 batteriesThis battery grip/holder is compatible with Canon EOS 550D/Rebel T2i SLR cameras. It has all the same functions as the original Canon BG-E8 battery grip. The grip has a built in vertical shutter release button, and can hold two LP-E8 lithium-ion battery packs, or six AA batteries using the included battery holder. Additionally, it supports features such as AE lock and FE lock, and retains access to the Index/Reduce button, main dial, AF-Point Select button, and Aperture/Exposure Compensation Buttons.
Hold 6 AA batteries or 2 LP-E8 Li-ion batteries.
Vertical shutter with half-press function. More comfortable vertical shooting.
Professional edition with vertical-grip shutter-release button, main dial, AE-L button, Index/Reduce button and Exposure button.
Tripod screw mount.
Same functions as the original battery grip Canon BG-E5. High quality product with big discount from the original one.
One Year Warranty
Specifications:
Type: Battery grip for the CANON EOS 550D / Rebel T2i
Battery pack LP-E8/6X AA Batteries
Power Switch: Camera's power switch
Color: Black
Dimensions: 130x75x105mm
Weight: Approx. 395g. (without batteries and battery magazine)
Price:
The high-capacity Opteka EN-EL9 rechargeable lithium-ion 2000mAh battery is a high quality replacement for Nikon EN-EL9 Battery. It features lithium technology, which ensures maximum battery life and maximum power. It also features no memory effect that lets you recharge partially drained batteries without reducing performance. Beware of low quality knockoffs, they can often damage your camera. Opteka Batteries are Guaranteed. 
The Opteka LP-E8 rechargeable lithium-ion 2000mAh battery is a replacement for replacement for Opteka LP-E8. It features lithium technology, which ensures maximum battery life and maximum power. It also features no memory effect that lets you recharge partially drained batteries without reducing performance.