My mom wants an electric lawn mower. Any reccomendations?

Well I've had my Toro Personal Pace mower for 10 years now, still starts on the first pull and only 2-3 pulls after sitting all winter. My wife does have problems pulling it though as she has weak wrists. I change the oil every year and the spark plug every 3-4 years but never see anything wrong with the old one. I really like the personal pace feature and guess I am one who will keep using it until I die...