I tell you my experience.
This morning I've not anything to do, so I tried to see battery life in high performance with 35 f/2, at about 22 celsius degree I have at my home (CIPA would tell 23), only EVF, P mode, RAW+JPG, 20% shoot with flash (Nissin i40), turni on/off every 10 shoot, and auto ISO. I shoot only 100 frames, then I've interpolated the result (so it can be little imprecise).
I followed (almost) the CIPA standard and got 238 shoot (manual reports 210 in such conditions, with 35 1.4), and at the end the camera was only slightly warm, similar when I used Nikon D750 in livewiew.