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n. Abbr. A.h. or amp hr
The electric charge transferred past a specified circuit point by a current of one ampere in one hour.


(Units) a practical unit of quantity of electricity; the quantity that flows in one hour through a conductor carrying a current of 1 ampere. 1 ampere-hour is equivalent to 3600 coulombs. Abbreviation: a.h.


a unit of electric charge equal to the amount of electricity transferred by a current of one ampere in one hour. Abbr.: Ah, amp-hr, amp. hr.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ampere-hour - a unit of charge equal to 3600 coulombsampere-hour - a unit of charge equal to 3600 coulombs
charge unit, quantity unit - a measure of the quantity of electricity (determined by the amount of an electric current and the time for which it flows)
ampere-minute - a unit of charge equal to 60 coulombs
References in periodicals archive ?
The Application Kit includes Altairnano's 24 volt, 50 ampere-hour battery module, a connection and control unit (CCU) including a battery management system, together with a NetBook computer configured to control and monitor the system performance.
*Battery capacity refers to the total amount of electric current, in terms of ampere-hour (Ah), produced from the beginning to the end of the use of a battery, without charges during the course.
Assuming a 10% safety factor, the daily current consumption is 444 ampere-hour per day;
The newspaper noted that the Fledge HEV, which includes a 200 ampere-hour battery and a 1.3-liter gasoline tank, will compete in the Northeast Sustainable Energy Association's Tour de Sol later this month.
It also monitors or provides profile statistics, elapsed operation time, charge and discharge current, charge and discharge voltage, temperature, and ampere-hour accumulation.
Edison Minit-Charger notes how its sequential system can recharge - return ampere-hour capacity to a depleted battery - at a charge current level up to four times higher than conventional chargers.
The system includes a battery-backed real-time clock, battery-backed SRAM memory, graphical display, PC memory card slot, optically isolated RS232 interface, the company's standard 9-pin port, and a 7 ampere-hour lead-acid battery.