Polaroid, the ultimate camera of the 80's. The Cartridges that they used to use had film and a battery in them. These batteries will kick out 5.8v.
This is a re-publish so that I can put it in a contest and edit. This is in the green contest because you are re-using an old battery.
Step 1: Step 1
To start, you need a 300 Polaroid cartridge. Tear it apart until you find the battery. It is usually in a white package. see picture. Use a volt meter or LED to find positive and negative. label them.