In the past we did some that were battery powered, and it's doable. As a research project, a lot of the research is on the motion and mechanism design. Given l

In the past we did some that were battery powered, and it's doable. As a research project, a lot of the research is on the motion and mechanism design. Given limited resources (both budget and people), battery power was removed from the scope of the project until there's a strong reason to do it. It's more of an engineering challenge than actual science if that makes sense.