The certification shows a new battery as we reported previously, it'll be the LP-E6NH with a voltage of 7.2v and 2130mAh. Perhaps the “H” means “high-capacity”.
The certification also says the camera is compatible with the Speedlite 600EX-RT, does that mean the EOS R5 will have a wireless trigger? We haven't heard that suggestion previously.
The camera is also compatible with the Canon RS-60E3.