I don't know the specifics, I think generally EGO has a 3 year warranty on batteries, 5 year on tools. I only know that because I just looked it up because the wife's EGO saw wouldn't start. Told her she had a week on her warranty to get going, then while cleaning it up- dumb me found the chain brake on....I hope too. A lot to compare. 10 years is long now for any appliance unfortunately.
My wife’s EGO push mower battery has about half the power going into the 3rd season. What she could mow on one charge now half. No other mechanical problems. Sharpened the blade last year. Not used all that much. Still likes her Kubota.
If it can last another year on par with the cheap gassers. What worry’s me is all the little $2 parts that could go wrong and unable to source or repair and total the whole machine. Lot less manufacturers and repair shop help after warranty. Willing to gamble with a few hundred. $5,000 steep. That much power, current and force is going to wear parts. It might be a winner with enough owners figuring out and posting the repair hacks.
Already on the hunt for discarded electric machines to madmax into tractor based vegetation slicers and dicers.