Canon Battery Pack LP-E17 - 1040 mAh - Lithium Ion (Li-Ion) - 7.2 V DC - Walmart.com
Amazon.com : Kastar Li-ion Battery for Canon BP-508 BP-511 BP-511A BP-512 BP-514 and EOS-20D EOS-D30 EOS 30D EOS 40D EOS 50D EOS 300D EOS Kiss FV300 FV40 G-1 MV-300 MV-300i MV-30i MV-400i