Alkaline batteries are a type of power cell dependent upon the reaction between zinc and manganese dioxide (Zn/MnO2).
Compared with original zinc-carbon batteries, while both produce approximately 1.5 volts per cell, alkaline batteries have a higher energy density and longer shelf-life.
The alkaline battery gets its name because it has an alkaline electrolyte of potassium hydroxide, as opposed to the acidic electrolyte of the zinc-carbon batteries which are offered in the same nominal voltages and physical size.
In "alkaline battery", the electrolyte is KOH or NaOH and the half-cell reactions are:
Zn + 2OH- -------> ZnO + H2O + 2e-
2 MnO2 + 2e- + H2O -------> Mn2O3 + 2OH-
The alkaline dry cell lasts much longer as the zinc anode corrodes less rapidly under basic conditons than under acidic conditions.
Batteries of LR20,LR6 and LR03 are supplied by our company.
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