OP, you said you bought it October 2021 and it had a two year warranty. Please just bring it back and see what they’ll do for you. I haven’t understood why you’re struggling with this decision.
I’m struggling because warranties take forever to fulfill typically, and I can’t not mow the lawn for 6 weeks while they mill over their decision. I was trying to make it to the end of the season, but I don’t think I’ll be able to.
Do you have a neighbor that would let you borrow theirs for the rest of the season? If both your yards are small, maybe mow their yard when you do yours as a barter?
I don't really. There are people that mow their own lawns but I don't know them. It might be a bit awkward, "Hey! Nice to meet you, I live down the street, can I borrow your mower?".
Anyways, I've been on hold with Ego's warranty department for two hours so far, fuck these guys. Anyone want to buy a shitty mower? I'm going back to gas.
I don't think you ever mentioned what voltage your mower is. My Internet sleuthing shows that most EGO stuff is 56V (unlike Greenworks' disaster of 24V, 40V, 60V, and 80V products) so must be that?
I can mow a 7000 square foot lot, about 4,000 square feet of grass (0.09 acres) with one 80V 2.0Ah (160Wh) battery and have never had it die. Your 2*7.5Ah and 2*3.5Ah of batteries is 1232Wh. Even allowing the triple yard size and possibly self-propelled, something is wrong with your mower.