Maximalpower BP-511 BP-511A Battery for Canon EOS 5D, 50D, 40D, 20D, 30D, 10D, Digital Rebel, 1D, D60, 300D, D30, Kiss, Powershot G5, Pro 1, G2, G3, G6, G1, Pro90 is, Optura 20, Xi, 10, PI, 200MC, 100MC, Fully Decoded, REAL Capacity Amazon.com is the only authorized dealer selling MaximalPower brand products. Please make sure your item is ONLY sold and shipped by Amazon.com! All other marketplace vendors are selling counterfeit products that do not perform the same, and/or are not covered by our MaximalPower Warranty