The canon LP-E4 Battery, has a Cap,acity of 2300 mAh, so it is possible to
shoot up to 2200 shots at normal temperatures on a single Battery, charge. The
Battery, is also more compact and lighter in weight than previous Battery,
models. The LP-E4 Battery, communicates with the EOS-1D Mark III, EOS-1Ds Mark
III & 1D Mark IV.