ClearMax Battery (2-Pack) of High Capacity Batteries For Canon EOS 5D, 10D, 20D, 20Da, 30D, 40D, 50D, D30, D40, And 300D/Digital Rebel SLR Cameras This Kit Includes 2 High Capacity Lithium-ion Batteries Rechargeable Li-Ion Batteries with Premium Battery Cells Integrated Microchip Prevents Overcharging & Lengthens Battery Life The Canon Info-Lithium Rechargeable Battery Pack is for Canon Digital Cameras such as: EOS 5D, 10D, 20D, 20Da, 30D, 40D, 50D, D30, D40, And 300D/Digital Rebel