If I had one of those it would get lost but at least it would hit the fence somewhere.
I can see it lost and alone looking for the charger just before expiring having ventured too far from the mother ship.
It never gets lost lol
Because it requires user to install boundary wire around area to be mowed. And also the guide wire.
Both wires are connected to the charging station and have small electric current flowing through them. The robot can detect this current and never crosses over. I am using this robot mower for 3+ months and it never got lost. It starts looking for guide wire when it’s battery power drops below 30%. So it never has died on me. The wires are installed a few inches away from obstacles such fence or tree. So robot does not bump into anything.