Make a Homemade Battery - This Home Made Battery Works!

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You can make a working home made battery by using 10 copper pennies, aluminum foil, paper towel, electrical tape, salt water, and two small wires. You can then verify that your battery works with a voltmeter.

INSTRUCTIONS

Cut out 10 circles of aluminum foil the size of a penny.
Cut out 20 squares of paper towel slightly bigger than a penny.
Stack the pennies, foil, paper as shown below with a penny, then paper, then foil, then paper, repeated.
Tape one wire to top penny and one wire to bottom foil.
Place long strip of tape all the way around to hold stack together.
Soak stack in salt water.
Use a voltmeter to measure the voltage. Even though there is little current, the voltage will be near 0.5 volts.