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.
★★★★★ Perfect replacement for my EOS-1D X Mark II. It holds charge well, and the camera accurately shows remaining power, shutter count, and recharge performance. Reliable Canon quality—worth it.