Posting this just for others information...
My mower was new in June of 2021 - has 60 hours on it and I mow 1.25 acres (90ish minutes) each mow. First mow of the year, my batteries were a bit sleepy (as I expected). I got 90-95% through my mow and the blades cut out. I am in SE WI and store the mower on the charger in the back of an insulated garage. I am guessing it will be better after a few spring mows (also it was 45 degrees out, so that may have cut the mow short as well). In the first 2 seasons, I never got below 4 bars on the mower when mowing the full lawn.