Canon EOS Camera Rechargeable Battery LP-E4
Dedicated high-capacity rechargeable lithiumion battery for the EOS 1D Mark III. Rated voltage of 11.1V-2300mAh. Can be recharged over 500 times. Lighter and more compact than previous batteries. Suitable for use with the EOS 1Ds Mark III, EOS 1D Mark III, EOS 1D Mark IV.