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Ever had your cell phone battery die and have no outlet around to provide any juice? Here's the solution!
You'll need the following:
Cut one of the jumper cables in half and strip both ends, also take 2 pieces of wire and strip them too. solder half of the jumper cable ...
hook your contraption to a battery of at least 4v and meter the output
If it works, then solder it onto either some clips or the device you want to power. here are some examples of what you can use it for
How to Make a Portable USB Cell-phone Chargerby romanursuhack
How to dry out and fix a cell phone-water damaged.by keegsta123
Better Cell Phone Signal, Reception, and Coverageby jingoye
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