I’m not happy that Bose didn’t make the battery thing retroactive. For those that were early adopters, Bose sends a case, which I would most likely never use.
That said, I doubt I would use the batteries either.
Look at it this way..if you were a busker on a street corner with a guitar like a Gibson Hummingbird & Bose S1 the battery feature would be ideal as it was intended.