I get all of mine from dead 9 volt batteries and it only takes a minute to do
- First you start by pulling back the metal edge around the top with a pair or pliers
- After you have the top free there will be two strips of metal connected to the top, you can sometimes pull these off by hand but it's just as easy to use a pair of side cutters
- Once you have the top free you can now solder on leads if you like or straight to a project.
- You can also cover the solder joint with hot glue to insult everything