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|EtoS = |PtoW = |CtoDE = 65%–80%〔(Mpower: Nickel Iron Batteries )〕 |EtoCP = 1.5〔 – 6.6〔 Wh/US$ |SDR = 20%〔〔 – 30%〔/month |TD = 30〔 – 50 years〔〔("Nickel Iron Battery Frequently Asked Questions" BeUtilityFree )〕 |CD=Repeated deep discharge does not reduce life significantly.〔〔 |NomV=1.2 V〔 |CTI=min. −40 °C – max.46 °C〔Web archive backup: (Edison Battery Booklet ) original instruction book for the Edison battery〕 }} The nickel–iron battery (NiFe battery) is a rechargeable battery having nickel(III) oxide-hydroxide positive plates and iron negative plates, with an electrolyte of potassium hydroxide. The active materials are held in nickel-plated steel tubes or perforated pockets. It is a very robust battery which is tolerant of abuse, (overcharge, overdischarge, and short-circuiting) and can have very long life even if so treated.〔David Linden, Thomas B. Reddy (ed). ''Handbook Of Batteries 3rd Edition'', McGraw-Hill, New York, 2002 ISBN 0-07-135978-8, Chapter 25〕 It is often used in backup situations where it can be continuously charged and can last for more than 20 years. Due to its low specific energy, poor charge retention, and high cost of manufacture, other types of rechargeable batteries have displaced the nickel–iron battery in most applications. == Uses == Nickel–iron batteries have long been used in European mining operations because of their ability to withstand vibration, high temperatures and other physical stress. They are being examined again for use in wind and solar power systems where battery weight is not important. Many railway vehicles use Ni–Fe batteries. Some examples are London underground electric locomotives and New York City Subway car – R62A. The technology has regained popularity for off-the-grid applications where daily charging makes it an appropriate technology.〔Mother Earth News Issue #62 – March/April 1980〕〔http://www.nickel-iron-battery.com/〕〔Home Power Magazine Issue #80 December 2000/Jan 2001〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nickel–iron battery」の詳細全文を読む スポンサード リンク
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