The Canon LP-E19 Battery Pack is a rechargeable lithium-ion battery designed for the EOS-1D X Mark II. It features a generous 2750 mAh capacity and requires the LC-E19 battery charger for charging. The LP-E19 Battery Pack communicates with the camera to display information about remaining charge, shutter count, and recharge performance in the camera's power source info screen so that you are never caught unawares in the middle of an important shoot. The pack includes a battery cover to keep your battery safe from dust and accidental damage when not in use.