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
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Canon EOS 40D Digital DCA001 1500 mAh Digital Camera Battery - BattDepot United States
Best Buy: Digipower Rechargeable Lithium-Ion Battery Pack for Canon EOS 40D Digital Cameras BP-CN511
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Hot sell 1pcs BP-511 BP511A Battery for Canon EOS 40D 300D 5D 20D 30D 50D 2500mAh, for canon accessories + wholesale - AliExpress
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
Kastar 2-Pack BP-511 Battery Replacement for Canon ZR90, ZR90MC, EOS 5D, EOS 10D, EOS 20D, EOS 20Da, EOS 30D, PV130, EOS Rebel DS6041, EOS 40D, EOS 50D, EOS 300D, EOS D30, EOS
Miller Electric BIG 40D 40G 12V 35Ah Industrial Replacement Battery: BatteryClerk.com Industrial
Canon 40D battery: what are the options?
BATTERY GRIP 40D
DSLR Canon Eos 40D 10.1 MP with Battery Grip Canon BG-E2 No.1831106317 | eBay
BATTERY GRIP 40D
Promaster ProMaster BP-511A Battery - Canon 50D, 40D, 30D, 5D Classic - ASAP Photo and Video
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
Miller Electric BIG 40D 40G 12V 35Ah Industrial Replacement Battery: BatteryClerk.com Industrial
Pre-Owned - Canon EOS 40D BODY w/Canon BG-E2 Battery Grip at Acephoto.net
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
CANON Battery BP-511A EOS 40D 50D 5D D30 & more!! | eBay
Canon BG-E2N Battery Grip for EOS 20D/30D/40D/50D -Clean in Box-
Battery / Charger For Canon EOS 40D EOS 50D EOS 300D EOS D30 EOS D60 DS126091 | eBay
2200mAh BP-511A 511 Battery for 20D 40D 50D 300D BP-512 BP-514 Camera | eBay