I wouldn't count on the included batteries being effective.
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2
I had some 600 speed Polaroid film which was only a few months past its expiry date, and it was completely useless. It hadn't been frozen or refrigerated, but I've read that doing either of those doesn't make a great deal of difference with instant film.
imho refrigerating helps a lot. especially with peel apart film, I recently had b+w film from 95 which was still quite o.k. but I also had sx-70 which was 4 years over the date and still fine.
the batteries are a problem indeed. yes, it's possible to swap the battery from a recent empty cassette with a not working one. it has to be done in absolute darkness, at least I had success with this twice. the battery was good for a whole second film cassette. working it out with an empty cassette in daylight helps a lot.