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/diy/ - Do-It-Yourself

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>> No.2473233 [View]
File: 127 KB, 1400x933, PennyPile-3386936277.jpg [View same] [iqdb] [saucenao] [google]
2473233

>exhange dollars for thousands of pennies.
>Sand off copper on one side to expose zinc, leave copper on other side
>stack them copper side to zinc side with wet paper between
Cheap single use battery stack



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