Amazon.com: Kastar Battery (4-Pack) and Charger for Canon BP-511, BP-511A, BP511, BP511A and EOS 5D, 10D, 20D, 30D, 40D, 50D, Digital Rebel 1D, D60, 300D, D30, Kiss Powershot G5, Pro 1, G2,
Battery Canon Eos 50d Bp 511a | Canon Battery Charger Bp 511a - Bp-511a Bp-511 - Aliexpress
4X 1800mAh BP-511A BP-511 BP511A BP511 Camera Battery +LCD USB Dual Charger for Canon EOS 5D 50D 40D 20D 30D 10D 1D D60 300D D30 - AliExpress
Kastar 1-Pack Battery and LTD2 USB Charger Replacement for Canon BP-508 BP-511 BP-511A BP-512 BP-512A BP-514 BP-522 BP-535 Battery, Canon CB-5L CG-580 Charger, Canon Battery Grip BG-E2N - Newegg.com
PROMASTER BATTERY/BP-511A
BP-511 BP-511A Li-Ion Battery for Canon EOS 40D 50D 5D 20Da 663250734608 | eBay