Alkaline battery
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Alkaline batteries are a type of power cell dependent upon the reaction between zinc and manganese dioxide (Zn/MnO2). Compared with traditional carbon/zinc batteries, whilst both produce approximately 1.5 volts per cell, alkaline batteries have a higher energy density and longer shelf-life. Compared with silver-oxide batteries, which alkalines commonly compete against in button cells, they have lower energy density and shorter lifetimes.
A cell consists of a steel can, nickel-plated at both ends, the negative, flat terminal being electrically isolated with a nylon seal. Inside the can is the manganese dioxide cathode, a separator membrane, the powdered zinc anode in a potassium hydroxide water electrolyte. Finally, at the axis is a brass pin electrically connected to the negative terminal.
Around the 1990's, new alkaline batteries stopped having mercury added to them.
The long-lasting alkaline battery was invented in 1959 by Eveready Battery engineer Lewis Urry.
Rayovac produced a rechargeable alkaline battery, which they called Renewal.de:Alkali-Mangan-Batterie ja:アルカリマンガン乾電池