Neewer Professional Vertical Replacement Battery Grip BG-E3 for Canon EOS 350D, 400D / Rebel XT, XTi Pro Battery Grip for Canon EOS 350D 400D Hold 6 AA batteries or 2 NB-2L Li-ion batteries. Vertical shutter with half-press function. Doubling the battery capacity of your camera, effectively extend your shooting time. Professional edition with functional buttons.