Let’s say you’ve driven out in to the boonies and your cell phone goes dead
Now you just have to make a call.
The question is how do you charge your phone battery.
You’ve got a 12V battery in your car but the cell battery is only 3V.
If you have a pencil and some wire your in luck.
Watch the video to see how it’s done.
https://www.youtube.com/watch?v=sEncZHchsA4
How To Charge Your Cell Phone Using A Pencil
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