Power your Canon EOS R5 C from a mains power outlet with this AC Power Supply Adapter to Canon 9V LP-E6 Type Dummy Battery from IndiPRO Tools. With an 8' long US power cord, you can enjoy freedom to move around your space without worrying about running out of battery power.
The adapter handles down the power conversion, keeping additional heat away from your camera, and the power cable from the adapter to the LP-E6-type dummy battery incorporates a choke to help prevent AC ripple that can disturb your camera's smooth functioning. As mentioned, the power adapter comes with a US power cord, but it supports worldwide power, requiring only optional plug adapters for the country you are in.