Amazon.com : Canon Powershot BP-511 / BP511 / BP 511 Replacement Battery - 2 Pack : Digital Camera Batteries : Electronics
Amazon.com : Synergy Digital Camera Battery, Compatible with Canon EOS Digital Rebel Digital Camera, (li-ion, 7.4V, 1500 mAh) Ultra Hi-Capacity, Compatible with Canon BP-511 Battery : Digital Camera Battery Chargers : Electronics
Amazon.com: Kastar 2 Pack BP-511 Battery Replacement for Canon BP-511A and Canon PowerShot G1 G2 G3 G4 G5 G6 PRO 1 PRO 90 IS FV10 FV100 FV200 Camera : Electronics