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Magnesium dry cells patterned after the conventional Leclanché cell now appear to be worthy of acceptance in many applications. The cell contains a magnesium alloy anode, MnO2+BaCrO4+normalacetylene black cathode , magnesium bromide electrolyte inhibited with lithium chromate, and a paper separator. The cell is characterized chiefly by very high capacity, particularly when the load resistance is designed for the voltage level of the cell. In series batteries, the optimum number of cells is 15 to 30 per cent less than the number of Zn cells required for the desired voltage. Cells made during the early stages of development have now been successfully stored two years, retaining more than 85 per cent of their initial capacity. Low temperature discharge properties are highly promising and tropical storage properties are outstanding.

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