Canon EOS 1DS Mark III Digital Camera Battery (Li-Ion 11.1V 2500 mAh) - Replacement for Canon LP-E4 battery Replacement battery for the Canon LP-E4, Lithium-Ion (Li-ion) 11.1V (2500mAh) This Synergy Digital battery is fully compatible with the original Canon LP-E4 Battery. You can rest assured that this battery will work with your Canon Cameras that use LP-E4 and it can be charged with the original manufacturers charger. We use only high quality Japanese cells, so you are sure this battery will last for years to come. Synergy Digital is a very high reputable company that manufactures batteries and other electronic accessories for over 2 decades, all our products come with a 3 year manufacturer warranty.