@arichtman I bought a Makita battery mower 4 years ago since most of my power tools are Makita using the 18V packs. Very happy with it. It's super light and can be stored standing vertically. I usually go through a set each of 5 and 6 Ah packs unless grass is very dry and light. Area is app. 400 square meters.

I would not buy a mower with proprietary batteries since they are the biggest ticket items.