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.
Step 2: Step 2
Get 2 LEDs and connect them so that they are in seris. This a 2 in 1 status LED I found while tearing apart a computer. Connect or solder the negatives and positives together.
Step 3: Step 3
Tape the LED's connections to the coresponding polarities on the battery.
Step 4: TaDa!!
You are done!!! YAY!!!! OH YEAH!!!!
The LED should light up. If it doesn't, switch the connections. Both LED's will light up and you will have a flashlight or light. Enjoy.
It provides ~5v so you could also use this for a USB charger, or IR light.
Post anything else you think is needed.