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 ?
Instead, stick with the same voltage, but shop around for a tool that offers more amp hours.
To see what kind of difference amp hours make, we conducted our own "seat of the pants" test.
For productive and profitable battery fleet powering, the Wi-iQ battery monitoring system collects a range of battery operating data, including amp hours charged and discharged, temperature voltage and electrolyte level.
Single-phase models are available and accommodate batteries ranging from 12 to 48 volts and 425 to 965 amp hours.
To extend battery life and lower total cost of ownership, the CellTrac battery management system measures crucial battery parameters including voltage, current, Amp hours, battery temperature, cable temperature, electrolyte level, depth of discharge and alarms.