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Storage or Secondary Cells

Electric current can not be produced on a large scale by primary cells. Since it demands the periodic replacement of exhausted cells by new ones, entailing a number of inconveniences and additional expenses. However, there are electric cells, in which a reversible electro chemical process can take place with high efficiency; here we have not only the transformation of chemical energy into electrical, but also the reverse transformation of electrical energy into chemical, with the spent electrodes being regenerated bypassing current through the cell in the reverse direction. Cells that allow electrical energy to be stored and expended are called accumulators (also secondary or storage cells). The process of storing energy in an accumulator is called the chagrin, and the process of giving our energy in the form of an electric current, the discharging. Accumulators or storage cells owe their name secondary due to the fact that they can give electrical energy only after they have been charged. Several storage cells are usually connected in series to make up a storage battery. They may be acid (or lead) type and the alkaline (nickel-endemism and nickel iron) type.

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