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 ?
Since volts x amps = watts, 450 amp hours x 24 volts = 10,800 watt hours, or 10.
An integrated power conditioning system has a sealed lead acid battery with 42 amp hours for extended run times, and an LCD battery status display for monitoring the more than eight hours of cordless mobile computing.
With a rating of 92 amp hours each, the two batteries wired in parallel (+ to +, and--to-) will store a total 184 amp hours, or 2.
The battery back-up provides as standard, integrated 310 amp hours capacity at -48 VDC and 620 amp hours at +24 VDC.
An optional battery enclosure for up four batteries providing up to 12 amp hours of reserve power is also available.
The new DETA/TUDOR FF product line features three different configurations -- two six-volt batteries ranging from 180 amp hours to 285 amp hours, and one 12-volt battery with 85 amp hours.