Dolica DC-BG-E8 Battery Power Grip for Canon T5i/ T4i/T3i/T2i (Black) With two packs, the already-impressive battery life is doubled, compared to using a single battery pack in-camera Built-in shutter as original grip Includes a wireless remote IR shutter release High quality construction, features an additional shutter release, tripod screw mount AF point selection controls for easier vertical shooting