Several EOS R series cameras can be charged from an external battery pack
BRIAN SAYS… EOS R was the first camera to be able to be charged from an external battery pack plugged in to the USB-C port, but it would stop charging if switched on. EOS R5 and EOS R6 will charge and operate while connected to an external battery pack. You’ll need to have an LP-E6N or LP-E6NH battery in the camera and power from the external battery.