ampere-hour

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ampere-hour

[′am‚pir ¦au̇·ər]
(electricity)
A unit for the quantity of electricity, obtained by integrating current flow in amperes over the time in hours for its flow; used as a measure of battery capacity. Abbreviated Ah; amp-hr.

ampere-hour

A current flow for one hour measured in amperes (amps). Abbreviated "Ah" and commonly called "amp-hour," it is widely used to rate how long it takes for a battery to discharge. For smaller batteries, a milliampere-hour (mAh) rating is used. For example, a 500 mAh battery means it will release 500 milliamps of current at a specific voltage for one hour before it is discharged. See ampere.


Amp-Hours and Watt-Hours
Batteries can be rated in amp-hours (Ah) or watt-hours (Wh) as shown in these examples for a digital camera. The bottom battery is equivalent to 3.3 Wh, while the top battery is equivalent to 667 mAh.
References in periodicals archive ?
Capacity is the amount of energy a battery can deliver in a single discharge (normally expressed in ampere hours).
If a typical observing session lasts 8 hours, choose a battery rated for at least 8 ampere hours of output.
The size of a battery is expressed in Ampere Hours (AH).
Dehqan said the firm which was constructed in 17,600 square meters is capable of generating 2.5 million ampere hours of different types of flat and cylindrical rechargeable batteries for military and non-military purposes.
This will give a usage value in ampere hours (amp hours or AH).