Is that a big energy consumption? It's about 0.5 kWH, or about $0.10, depending on where you are. How much would you spend on gas & oil for a 2-stroke ICE system?
(I can understand that it's a bit of a hassle from a charging process point of view.)
Now, this isn’t so bad for my yard but if I was mowing my grandparents yard like I did as a kid that would be a really annoying limitation since they had like an 0.75 acre lot.
I hope that battery technology continues to improve but today it is for sure a limitation.
If the world were like that, it wouldn't be an issue to grab some of the standard multiuse batteries you have lying around your house and use them for the acre lot mow job (sometimes while doing landscaping you need to take a gas can out with you too, after all).
Instead what we are left with is every brand has their own standard, which changes every few years, leaving the consumer with a mountain of useless crap to perennially replace and increases the costs of electric appliance adoption (whereas gas is standardized and cheap and works for your car as well as all your equipment, 2 stroke aside).