![]() Zinc-Carbon is a very basic and popular type of primary AA Battery. The potential difference between the electrodes in a typical Primary AA Battery, which we also call the Battery Voltage, is 1.5V and in the case of a Secondary AA Battery, it is 1.2V. You can get AA Batteries as both Primary and Secondary types. Irrespective of the chemistry of the cell, all AA Batteries are “Dry Cells” as their electrolyte is not liquid (usually a semi-solid gel or paste). Coming to the flat negative terminal, its diameter must be at least 7 mm.ĪA Batteries have only one cell in them but they can have different anode, cathode or electrolyte chemistries and compositions. The height of the positive terminal must be at least 1 mm and its diameter can be up to 5.5 mm. They are the height and diameter of the positive terminal and the diameter of the negative terminal.
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