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How many watt hours is a battery?

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How many watt hours is a battery?

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A 12 volt 1ah (amp hour) battery is rated to put out 12 watts for 1 hour before it is fully discharged. Or it could do 24 watts for a half hour. A 12 volt 2ah battery can put out 24 watts for 1 hour or 48 watts for half an hour. A 12 volt 4ah battery could put out 48 watts for an hour.

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