What Is the Difference Between Alkaline and Heavy-Duty Batteries?

The primary difference between heavy-duty batteries and alkaline batteries is the electrolyte they use to produce electricity. Heavy-duty batteries use zinc chloride as the electrolyte, while alkaline batteries use potassium hydroxide, an alkaline, as the electrolyte. A heavy-duty battery uses the outside zinc case as the anode, while an alkaline battery uses the zinc contained in a gel inside a steel case.