Canon EOS R5 Advanced User's Manual page 855

3.
Connect the DC coupler to the AC adapter.
Fully insert the DC coupler plug into the socket of AC Adapter AC-E6N
(sold separately).
4.
Connect the power cord.
Connect the power cord to the AC adapter and insert the power plug
into a power outlet.
Caution
While the camera is on, do not connect or disconnect the power cord or socket,
and do not remove the battery magazine.
Avoid getting the DC coupler cord caught between the battery grip and battery
magazine.
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