Amazon.com : Canon BG-E2N 40D - 30D - 20D Battery Grip : Digital Camera Battery Grips : Electronics
Canon EOS 40D Body, 2batts, charger, 4GB CF card, USB cable, 4814 Acts – RecycledPhoto
Amazon.com : Synergy Digital Camera Battery, Compatible with Canon EOS 40D Digital Camera Battery Lithium-Ion (1500 mAh) - Replacement for Canon BP-511 Battery : Electronics
Amazon.com: Synergy Digital Camera Battery, Works with Canon EOS 40D Digital Camera, (li-ion, 7.4V, 1500 mAh) Ultra Hi-Capacity, Compatible with Canon BP-511 Battery : Electronics
Amazon.com : Canon BG-E2N Battery Grip for Canon 20D, 30D, 40D & 50D Digital SLR Cameras (Retail Package) : Electronics