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Nickel-iron battery

Also known as the Edison battery. Lead-acid battery is an acid battery, in contrast, nickel-iron battery electrolyte is an alkaline solution of potassium hydroxide, is an alkaline battery. It was nickel oxide, iron cathode. Electromotive force of about 1.3~1.4 volt. The advantages of light weight, long life, easy maintenance, the drawback is inefficiency.