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.
12/18/2024: New firmware updates are available.
EOS C300 Mark III - Version 1..0.9.1
EOS C500 Mark II - Version 1.1.3.1
12/05/2024: New firmware updates are available.
EOS R5 Mark II - Version 1.0.2
09/26/2024: New firmware updates are available.
EOS R6 Mark II - Version 1.5.0
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