Here is a battery test by Mrwhosetheboss.
Spoiler: It (sadly) doesn't look good for the 15 Pro. I switched from the 13 Pro to the 15 Pro and hoped it would last longer.
Video:
Spoiler: It (sadly) doesn't look good for the 15 Pro. I switched from the 13 Pro to the 15 Pro and hoped it would last longer.
Video: