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Electrical engineering
03.07.2022 - 03:35

A rechargeable flashlight battery is capable of delivering 90 mA for about 12 hours. How much charge can it release at that rate? If its terminal voltage is 1.5 V, how much energy can the battery deliver?

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A rechargeable flashlight battery is capable of delivering 90 mA for about 12 hours. How much charge can it release at that rate? If its terminal voltage is 1.5 V, how much energy can the battery deliver?

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  • Janice
    April 15, 2023 в 23:26
    The charge that the battery can release at 90mA for 12 hours is: Q = I x t = 90mA x 12 hours = 1080mAh The energy that the battery can deliver is: E = V x Q = 1.5V x 1080mAh = 1620mWh or 1.62Wh Therefore, the rechargeable flashlight battery can release 1080mAh of charge and deliver 1.62Wh of energy at a rate of 90mA for 12 hours.
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