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watt-hour
(redirected from Board of Trade unit)

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia 0.09 sec.

watt-hour

The power utilization for one hour measured in watts. Abbreviated "Wh," it is widely used to rate how long it takes for a battery to discharge. For smaller batteries, a milliwatt-hour (mWh) rating is used. For example, a 500 mWh battery means it will release 500 watts at a specific voltage for one hour before it is discharged. See ampere-hour and watt.



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