The Canon BP-A30 Battery Pack For C300 Mark II, C200, and C200B battery pack mounts on your camera, providing 43.71 watt-hours of power. It is a rechargeable lithium ion battery compatible with Canon's Intelligent Battery system. The battery features a removable contact cover that can help keep the contacts clean and help prevent short circuit discharges when the battery is not mounted on the camera.
The battery incorporates a small push button that activates the remaining power indicators on the battery itself, allowing you to quickly determine the approximate power level of the battery without having to attach it to a camera.