My mom wants an electric lawn mower. Any reccomendations?

I bought a 40v Ryobi 7 years ago, I needed to replace the battery about 3 years ago and there a little pricy with higher amp ones being more expensive but other than that it's been flawless, it cuts long wet grass with no issues and the battery always makes it through the cut, it folds up for easy storage, the best part is no anual carb jobs because of ethanol fuel, I also have Ryobi weed trimer and leaf blower that are 40v, once I'm done the lawn I swap the battery into each one of those to trim then clean up. I don't have acreage anymore but I do have a large city lot, I have more than gotten my moneys worth out of this. After seeing how durable it is both my son's bought one for their homes, one about 4 years ago and the other about 3.5, both are also going strong.