Wasabi Power Battery for Canon LP-E4 and Canon EOS-1D C, EOS-1D Mark III, EOS-1Ds Mark III, EOS-1D Mark IV Rechargeable lithium-ion battery for Canon LP-E4 Note: Battery will NOT show remaining time with Canon EOS-1D X Premium Japanese cells for longer battery life; Can be charged with the original Canon charger Rated at 11.1V and increased 2700mAh for a 15% longer run time than the Canon original Includes battery and 3-year manufacturer warranty