We’ve been evaluating the best robot lawn mowers for three years. In that time, we’ve considered dozens of models, comparing their features, benefits and drawbacks. We believe the Husqvarna Automower is the best one because it is easy to operate and has a unique blade system and safety and anti-theft systems. It can cover a lawn up to 1/3 of an acre, which is more than adequate for most residential homes. On a full charge, the battery lasts 45 minutes, then the mower returns to its base and recharges in the same amount of time.