Amazon.com : Canon BP511A 1390mAh Lithium Ion Battery Pack for Select Digital Cameras and Camcorders (Retail Package) : Electronics
Amazon.com : Canon Original Genuine Battery Pack BP-511 BP 511 Akku Batterie Li-ion 20D 30D 40D 5D : Electronics
Kastar Battery (3-Pack) and Charger for Canon BP-511, BP-511A, BP511, BP511A and EOS 5D, 10D, 20D, 30D, 40D, 50D, Digital Rebel 1D, D60, 300D, D30, Kiss Powershot G5, Pro 1, G2, G3,