> People trying the craft often pick apart microwaves or car batteries to remove the power supply, which is then connected through jumper cables to nails attach

> People trying the craft often pick apart microwaves or car batteries to remove the power supply, which is then connected through jumper cables to nails attached to a piece of wood slathered with a conductive solution of baking soda and water. Car batteries don't need to be taken apart because there is no "power supply" inside; the battery _is_ the power supply, albeit low voltage and high current, which is not dangerous by itself from an electrical perspective. The flyback transformer inside a microwave, on the other hand, will kill you if you so much as look at it wrong.