Battery technology voltage

Leclanche s cells are produced in cylindrical and flat (prismatic) designs in different sizes. Their energy density at 20 °C is very low (65 Wh kg-1 for the cylindrical size, see Table 2) compared to the other primary battery technologies. Fiowever, they are the cheapest batteries available in the market (see Table 2). Their nominal voltage is 1.5 V, which is comparable with other battery technologies (see Table 2). 

Important manifestations of electrochemistry include battery technology and corrosion. Different types of batteries can be identified by the half-reactions involved. Batteries are classified as either primary cells, which cannot be recharged, or secondary batteries, which are rechargeable. The chemical origin of these differences is that the reaction in a primary cell results in products that cannot be reversed to regenerate the original reactants, whereas in secondary cells, the reaction can be driven in reverse by an applied voltage. Corrosion is another example of electrochemistry with practical implications, albeit not productive ones. In... 

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