So, if you looked at my profile you would see that I like physics.  When the challenge for “Potatoes” I just knew that I need to do a project that highlighted the lowly “Potato Battery”.  So here is how to make a Potato Battery and have it light an LED light.

Step 1:

Galvanized nails
Shinny copper pennies
Wires with alligator clips on each end (2+ per battery)
LED bulb
Multi meter
Cutting board
<p>trying to do this in my science Investigatory Project may I ask if how many is the required voltage for the bulb your using because i tried it with a 12 volt bulb and it took me like 10 potatoes and still no light </p>
<p>One potato battery will make about 0.85 volts. Do the Math to determine how many batteries you will need to light a 12 volt light. Maybe you will need to switch to a lower voltage LED light. Mine only needed 6 batteries to get mine to light. Hope this helps and thanks for asking.</p>
<p>Good info. I sure am going to try it. Probably have my kid take it to school as a project.</p><p>Thanks mate..</p>
<p>Welcome. I used it as a project in a class with teenagers. I thought it was fun! Thanks for commenting.</p>
If the battery works on the electrolyte Potassium, is it possible to make this work with salt water? Would NaCl be electrolytic enough?
yes you can <br>
Yes it can. Look at this Instructable to learn more: <a href="http://www.instructables.com/id/Salt-Water-Powered-Paper-Lights/" rel="nofollow">http://www.instructables.com/id/Salt-Water-Powered-Paper-Lights/.</a>&nbsp; Thanks for commenting.
science comes from the life.
Are your potatos rechargeable:)
Woman, you never cease to amaze me!
I keep coming back to this comment, it really tickles my fancy. :)
When I first learned that the Challenge was potatoes, I knew that I will have to do something wild and wonderful, which meant, not my &quot;potato soup or salad&quot; recipes. Glad you like it.

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Bio: In a valiant attempt to keep myself from dying of boredom, I create.
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