You can only test it with a fresh film pack (That is where the battery is). Film is available from "The Impossible Project" who now makes it, since Polaroid does not make it anymore. A pack of 8 shots costs about $24 plus shipping.
You are welcome. I have placed a bid. You always take a chance with these. Of all of the ones that I have bought, its about 50/50. The worst part is how much it costs to test one! Thanks for the listing.