Suspect the usefulness will end up being dictated by energy management concerns. Balancing mobility & runtime. The logistics of swapping batteries / charging ev

Suspect the usefulness will end up being dictated by energy management concerns. Balancing mobility & runtime. The logistics of swapping batteries / charging every hour, how well you can make them "camp" somewhere & wake up, needing very close "home bases" where they can charge and batteries are stockpiled etc. > Let's say twenty of these are deployed on a yard. If they are moving around, you need either a human swapping batteries more or less continuously (~20 battery changes / hour) next to a pile of lithium (maybe 100-200kg for 20 units) and a generator of at least 10-20kw. I guess you would want them to auto-charge off a vehicle or fixed equipment for it to be practical. Seems like you could make something work but IMHO they seem like less of an obvious "slam dunk" when you consider the fiddlier aspects of operating them.