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How to Make a Coin Battery

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Uploaded on Apr 16, 2008

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Sure you could take $2.50 and just buy some batteries, but how much fun would that be?

Step 1: Mix cider vinegar & salt
In a bowl, mix the cider vinegar and some salt.

Step 2: Cut out blotter paper
Cut out ten quarter-sized pieces of blotter paper.

Step 3: Tear aluminum foil
Tear off ten quarter-sized pieces of aluminum foil.

Step 4: Soak blotted paper
Soak the blotter paper in the vinegar/salt mixture for a few minutes.

Step 5: Build the battery
Time to build the battery. Start with a piece of foil, then a piece of blotter paper, then a quarter. Keep stacking in the same pattern: foil, paper, quarter… foil, paper, quarter… Until you’re out of quarters.

Tip
Make sure the foil is only making contact where it’s supposed to. If it’s touching more than one quarter, or another piece of foil, your battery may not work.

Step 6: Let battery charge
Let the battery charge for about 15 minutes.

Step 7: Touch LED's leads
Touch the LED’s negative lead to the bottom layer of foil, and the positive lead to the quarter on the top and presto – you have light.

Did You Know?
This method of generating electricity was discovered in 1800 by Alessandro Volta. His voltaic pile was the first wet cell battery to produce a reliable steady current of electricity.

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