Power Plant as Friend and Helper

So, blogging hasn't managed to keep me on task, obviously, but I'm back on my project (for now).

I did a little more exploring of my futuristic construction equipment. I realized that a fun futuristic approach would be to have each person have their own power source instead of relying on centralized power sources like we do now. My "robot butler" ball would be that power source. Everyone would have their own little power generating robot ball and they'd use it to power whatever they were currently using. It's R2-D2 meets dæmons from His Dark Materials meets Iron Man's Arc Reactor.

Here are the construction equipment sketches featuring the robot power ball: