If you’ve ever spent any time in a thrift store, chances are you’ve happened upon a hardware section and in that hardware section you’ve likely noticed several different versions of old handheld power tool batteries cluttering up the shelves.

People rarely buy these because everybody knows that if it made its way to the thrift store, there’s a pretty good chance that the batteries are either on their last legs or they have completely stopped holding a charge. You can turn this to your advantage, though, if you know what you’re doing.

With just an old battery packs, some simple and highly available chemicals, and a wick, you can put together an EXCELLENT smoke signal device. Learn how on the next page.

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