Canon EOS 40D Date and Time Battery Replacement - iFixit Repair Guide
If your date and time battery needs to be replaced, follow this guide to replace it. The required date and time battery is a CR2016 lithium.
Canon DSLR - iFixit
Canon EOS 40D Date and Time Battery Replacement - iFixit Repair Guide
Canon EOS 40D Date and Time Battery Replacement - iFixit Repair Guide
Canon EOS 40D Shutter Button Replacement - iFixit Repair Guide
Canon EOS 40D Date and Time Battery Replacement - iFixit Repair Guide
Canon-Eos-40D-Service-Manual-Repair-Guide by Anh Tran - Issuu
Canon EOS 40D LCD Replacement - iFixit Repair Guide
Canon DSLR - iFixit
Canon Knowledge Base - How to replace the date/time battery on the
Canon EOS 40D Shutter Button Replacement - iFixit Repair Guide
Canon EOS 40D Shutter Assembly Replacement - iFixit Repair Guide
Canon EOS 40D Date and Time Battery Replacement - iFixit Repair Guide
Canon DSLR - iFixit