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BA–4.—This battery consists of a single cell, being one of the cells in BA–1 or BA-3. Thus it is 3 inches long and 1-1/4 inches in diameter, and its weight is 4 ounces or 0.25 pound. It has an open circuit voltage of 1.55 volts, an internal resistance of between 0.15 and 0.2 ohms, a shelf life of 6 months, and a service life which depends entirely on its use


Used in


  • Training Pamphlet no.7 Primary Batteries Jun., 1922 W.D.D. NO. 1112

Adobe PDF icon.png TR PA-07 1922