BP-511 2000mAh Ultra High Capacity Li-ion Battery Pack with AC/DC Rapid Battery Charger for Canon EOS 5D, 10D, 20D, 30D, 40D, & 50D Digital SLR Camera

Ultra high power True 2000mAh, Lithium Ion 7.4vExtended shots - Up to 25% more then originalRapid Battery Charger with 12 V Car AdapterUniversal 100-240V for World Wide UseBrand new, non-OEM
Product DescriptionBP-511 2000mAh Ultra High Capacity Li-ion Battery Pack with AC/DC Rapid Battery Charger for Canon EOS 5D, 10D, 20D, 30D, 40D, & 50D Digital SLR

Source: Digital Camera and Video Store...