08-08-2017 03:59 PM - edited 08-08-2017 03:59 PM
08-08-2017 04:36 PM
You're out of luck. The instructions provide ample warning about not doing a firmware update unless you're certain that your battery is in good condition and fully charged. Send it to Canon. They can fix it, but you almost certainly can't.
05/13/2026: New firmware updates are available.
EOS R5 Mark II - Version 1.3.0
EOS R6 Mark II - Version 1.7.0
03/17/2026: New firmware updates are available.
SELPHY CP1500 - Version 1.0.7.0
01/20/2026: New firmware updates are available.
10/15/2025: New firmware updates are available.
Speedlite EL-5 - Version 1.2.0
Speedlite EL-1 - Version 1.1.0
Speedlite Transmitter ST-E10 - Version 1.2.0
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