As shown in the 3rd picture, the SS comes with a standard AC adapter.
Therefore you could use it as any other cordless vac, or mount the special bracket on the big Kirby to keep it handy when cleaning. You could even mount that bracket to the wall if desired.
In the early 90's, a version of the SS was made with a 12V cigar plug for car use. We got one as a gift for having an in-home demo of a Sentria. I still have it, still in the bag, never used.