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Look at the power rating of your CD player. There should be a kind of metallic sticker with that information. If it only specifies amperes and volts, multiply the two to get watts (that should be close enough for most practical purposes). Now, assuming you want yearly energy in kWh, convert the power to kilowatts. Then multiply this by the number of hours you use your CD player in a year. The answer is in kWh.

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11y ago

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