I was going to ask how long these robots can move without a power cord, but then I found this article from 2015 (https://www.bbc.com/news/technology-30919098) that says it's about an hour. If that was in 2015, I'm guessing they're above 2 hours now. Very interesting. If they could rapid-charge, and could just "take a break" for 15 minutes every 2 hours, they could be used alongside humans doing various manual tasks...