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Question

How do you test a dry cell battery?


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Solution

A dry cell is a battery that converts the chemical energy inside it to electrical energy. Dry cell batteries consist of a sealed chamber containing an anode, cathode and paste-like electrolyte. Dry cell batteries are designed to function at a particular voltage.

The following tests are conducted to determine if the dry cell battery is fully charged or discharged:

Drop Test of Dry Cell Battery :

The electrolyte in the commercial dry cell is potassium hydroxide. The cathode, which is magnesium dioxide undergoes an oxidation reaction. When the cathode runs out of magnesium dioxide, the battery dies.

Zinc oxide produced by the oxidation/reduction reaction between the cathode and anode gradually accumulates in the battery. When you drop a dead battery on its end from a 2-inch height, it will bounce, while a fully charged battery will land on the floor. This is how you determine if a battery is fully charged or discharged without the use of a multimeter.


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