Submitter gsimon was in a hotel room with no phone charger. A data cable, a paper clip, a key, and the batteries from the keyboard of the set-top box combined to make a fine substitute.
So one of my friends gave me an iPod touch that needed a new battery. But I didn't want to pay about $15.00 for a new one, considering that I could screw the thing up trying to solder it in. So I got the crazy idea to modify and use the working battery from my old cellphone. But it didn't fit inside the case because it was too thick. So I successfully connected it to the old battery's controller circuit and hooked up the "new" battery. I had to glue it to the outside of the case. Now, everybody wonders what that big black thing is on the back of the ipod. But hey, it works and charges just fine!