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How To Make a Coin Battery

Watch more Fun Tech & Science Projects videos: Subscribe to Howcast's YouTube Channel - Turn some quarters into a battery with just a few things you have around the house. Howcast uploads the highest quality how-to videos daily! Be sure to check out our playlists for guides that interest you: Subscribe to Howcast's other YouTube Channels: Howcast Health Channel - Howcast Video Games Channel - Howcast Tech Channel - Howcast Food Channel - Howcast Arts & Recreation Channel - Howcast Sports & Fitness Channel - Howcast Personal Care & Style Channel - Howcast empowers people with engaging, useful how-to information wherever, whenever they need to know how. Emphasizing high-quality instructional videos, Howcast brings you experts who provide accurate information in easy-to-follow tutorials on everything from makeup, hairstyling, nail art design, and soccer to parkour, skateboarding, dancing, kissing, and much, much more. 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.
Length: 02:01


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