Halcyon Replacement Canon BP-511 Battery for Canon EOS 50D, 40D, 50D, G1, G2, G3, G5, G6, PRO1, 10D, 20D, 30D, 300D, 5D Digital SLR Camera and Canon BP511 You can shoot up to around 540 pictures and around 680 pictures without the use of the flash, on one battery charge Lithium Ion Digital Cameras Battery