One thing I've always wondered about that, they explained where those are running, but how they still have autonomy? Are they producing they own power? How abou

One thing I've always wondered about that, they explained where those are running, but how they still have autonomy? Are they producing they own power? How about when they need to replace hardware? I am not saying it's impossible, but I would like to see that part being explored, even if it's in the tie-ins comics.