This Canon rechargeable battery pack LP-E4 is designed for exclusive use with the EOS-1D Mark III digital camera and EOS-1Ds Mark III digital camera. It has a rated voltage of 12V and a rated capacity of 2,300mAh, higher than the previous NP-E2. It can be recharged using the LC-E4 charger, and recharges in about 120 minutes. The seams that come into contact with camera are lined with silicon rubber packing to enhance water and dust resistance. Features High-capacity Lithium Ion Battery Pack 3 cells, 11.1V, 2300 mAh Designed for exclusive use with the EOS-1D Mark III 40% less volume than NP-E3 and 46% lighter in weight Recharges in about 120 minutes Can communicate information with the camera (can be viewed with the Battery infomenu): Power source type, remaining capacity 6-level icon, display in 1% increments, shutter count, and recharge performance (3 levels)

Compatible With Canon EOS-1Ds Mark III Digital Camera and Canon EOS-1D Mark III Digital Camera.