Potato batteries use the acids in the potato to start a reaction with two electrodes made of different metals that cause electrons to flow from one to the other through the potato, producing power. The potato acts as a s... More »

A watch battery chart is a type of cross-reference chart useful in determining appropriate watch battery replacements. Both Batteries.com and BatteriesInAFlash.com offer easy-to-read watch battery cross-reference charts. More »

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A battery diagram shows the positive and negative electrode, according to ExplainThatStuff.com. It may also show a wider circuit connected to the battery. More »

Fully charged 6-volt rechargeable batteries work by producing a chemical reaction between the battery's sulfuric acid and lead plates once hooked up to a load. This reaction covers the positive and negative plates with l... More »

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A potato helps power a light bulb by acting as both a bridge and a separator for two electrodes made of different metals. The two metals most frequently used are zinc and copper because of their ubiquity and difference i... More »

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The Maillard reaction is the name given to a reaction between sugars and amino acids and proteins when subjected to heat. In cooking, it causes browning of food and creates complex flavors. More »

While exploring what happens when metals come in contact with acids, it is apparent that most, but not all, have some sort of reaction, usually forming hydrogen gas. The result is the production of salts. More »