Have you looked at corded ones? Granted, there's the extension cord thing, but if your yard is sufficiently small...$$$$
I looked at an Ego today, but it comes with a tiny battery that they (ego) says will run for 30 mins. The big battery is as much as the mower
I do not. My local Ace Hardware charges $15 I think...You don’t have an angle grinder?
WTF?