Ampere-Hour
/ˈæm.pɛər aʊər/noun
A unit of electric charge equal to the charge transferred by a current of one ampere flowing for one hour.
Did you know?The unit is built from the name of André-Marie Ampère, the 19th-century physicist whose surname became one of the core measuring words of electricity.
Etymological Timeline
1820s
French
Ampère
“The surname of André-Marie Ampère, a pioneer in electromagnetism.”
1830s
English
ampere
“A unit name adopted for electric current in honor of Ampère.”
Late 19th Century
English
ampere-hour
“A practical electrical unit meaning the quantity of electricity carried by one ampere in one hour.”
Modern English
English
ampere-hour
“A unit of electric charge commonly used for batteries and battery capacity.”
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