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A zinc-carbon battery is a dry cell primary battery that delivers about 1.5 volts of direct current from the electrochemical reaction between zinc and manganese dioxide. A carbon rod collects the current from the manganese dioxide electrode, giving the name to the cell. A dry cell is usually of a zinc can which also serves as the anode with a negative potential, while the inert carbon rod is the positive cathode. General-purpose batteries may use an aqueous paste of ammonium chloride as an electrolyte, possibly mixed with some zinc chloride solution. Heavy-duty types use a paste primarily composed of zinc chloride. Zinc-carbon batteries were the first commercial dry batteries to use the technology of the wet Leclanch cell to manufacture. They made flashlights and other portable devices possible because the battery can function in any orientation. They are still used in low drains or intermittent use devices such as remote…