The LP-E19 Battery Pack from Canon is a rechargeable lithium-ion battery that is compatible with the EOS-1DX Mark II. The Battery Pack also communicates with this camera so that you can check the remaining charge, shutter count, and recharge performance in the camera's power source info screen.
★★★★★ This LP-E19 battery works perfectly with my EOS-1D X Mark II and shows accurate charge and shutter info. Reliable performance and great peace of mind for long shoots.