That's a lot quieter. Is this the first BD quadruped to run without a engine? Anyone care to guess how long the (I assume) batteries last?
I believe it still runs on diesel. It seems like they wanted to solve all the other issues before moving on to making things quieter and smaller. If you look at the latest ATLAS iteration it is also quieter.
Spot is a four-legged robot designed for indoor and outdoor operation. It is electrically powered and hydraulically actuated.