Canon BGE2 Battery Grip for the EOS 20D and EOS 30D Digital SLR Cameras Compatible with Canon EOS 20D and EOS 30D digital SLRs Holds up to two Canon Lithium-ion battery packs (BP-511/511A/512/514) or 6 AA batteries for increased shooting time Battery grip adds a vertical shutter release capabilities Optional hand strap (E1) is available Increases functionality and convenience for your Canon EOS DSLR