ampere-hour

quantity of electricity transferred by a current of one ampere in one hour

An ampere-hour (abbreviated as Ah or A-h) is a unit of electric charge. One ampere-hour is equal to 3600 coulombs (ampere-seconds), and is the amount of electric charge transferred by a steady current of one ampere for one hour.The ampere-hour is a unit frequently used in measurements associated with  electrochemical process such as electroplating and  electrical batteries. Although it is not a direct measure of the energy in a battery (like the joule (J) or watt-hour (Wh)), it is a common rating of how long a battery will last (or in the case of a rechargeable battery, how long it will last when fully charged).
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Noun
1. a unit of charge equal to 3600 coulombs
(hypernym) charge unit, quantity unit
(part-meronym) ampere-minute

ampere-hour /'æmpeəauə/
danh từ, số nhiều ampere-hours Ampe giờ
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