Opteka 2000mAh 7.4v Digital Camera Battery Equivalent to Canon BP-511 BP-512 Memory free for maximum performance, Ultra high power, True 2000mAh, Lithium Ion 7.4v Extended shots - Up to 25% more State-of-the-art-components, Built-in safety fuse, Top graded and matched cells used exclusively Brand New, 2 Year performance warranty