I dont see any reason not to allow all robots to use them either. Yes they have issuses, but not safety related (at least no more than current batteries) and if people want to try them the worst that can happen is they damage them by incorrect use and loose money, but thats the roboteers choice. I guess it will come up in the next FRA meeting, if there are alot more interest then perhaps the FRA commitie can do this by Email to resolve it sooner.