My mom wants an electric lawn mower. Any reccomendations?

About a year ago, I bought a Skil 40V lawnmower, basic model; it's been great.
Maybe 1/4 acre of lawn, it'll go 3 times before needing a recharge.
A few months ago, I bought a Skil 40V leaf blower, so now I have 2 identical batteries & chargers.
It's nice that I don't have to deal with gas, carbs, tune-ups & oil changes.
I'm still opposed to electric cars, though.