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Use copper and silver coins, with blotting paper soaked in salt water.
Stack the coins:- silver, blotting paper, copper, silver, blotting paper, copper, silver...etc.
Attach wires to the lower silver coin and the copper upper coin. Stack the coins so there are at least four pieces of blotting paper soaked in brine.
You can prove the battery's potential with a digital multimeter.
It will not produce much useful current, but you should be able to get 3 volts out of it.
You could get it to work a digital watch. (make sure you get the voltage right first.)
You could also try sticking dissimilar metal plates into a lemon. Try copper and steel, but experiment with different metals, see which is best.
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∙ 12y ago
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