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Follow this guide to replace the battery for the Canon EOS 40D. Make sure your battery is fully charged and it's the correct model if you have purchased a new battery. The battery should be a BP-511A Rechargeable Li-ion Battery, BP-514 Rechargeable Li-ion Battery, BP-511 Rechargeable Li-ion Battery, or BP-512 Rechargeable Li-ion Battery. With a BG-E2N battery grip or a BG-E2 battery grip, size-AA batteries can also be used.

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  • Locate the battery compartment cover on the bottom of the camera below the shutter button.

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  • Find the marked arrow on the battery compartment cover labeled "BATT. OPEN". Slide the lever following the arrow's direction and lift at the same time to release the latch.

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Image 1/1: Remove the battery.
  • Release the lever and allow the battery compartment cover to completely open.

  • Remove the battery.

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To reassemble your device, follow these instructions in reverse order.

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Doug Kruse

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