9.4 Salt Water Batteries

A salt water battery is a wet-cell battery that uses a reaction with salt water, air, and a magnesium anode to produce electricity. Just like any other battery, it requires chemical energy to produce electrical energy and that chemical energy needs to be replenished to keep the battery running. The unique characteristic of the salt water battery is that it uses the air as a cathode, so there is no need for separate half-cells for each electrode as in other wet-cell batteries.


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