Canon EOS R5 Advanced User's Manual page 790

Caution
Using a genuine Canon Battery Pack LP-E6NH/LP-E6N is recommended. If you
use batteries that are not genuine Canon products, the camera's full performance
may not be attained or malfunction may result.
Note
The shutter count is the number of still photos taken (not including movie
recording).
Battery information is also displayed when an optional Battery Grip BG-R10 is
used.
If a battery communication error message is displayed, follow the instructions in the
message.
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