What is the energy in joules?

What is the total amount of energy stored in a 12 V, 90 A·h car battery when it is fully charged?

2 Answers

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  • 1 decade ago
    Favorite Answer

    1 Amp Hour is 3600 coulombs

    A Watt is a Joule / s

    1 J= 1C*V

    Thus,

    90 Ah * 3600 C/Ah = 324,000 coulombs.

    324,000 coulombs * 12 volts = 3,888,000 joules.

  • TJ C
    Lv 5
    1 decade ago

    I am no battery designed. but I think

    90 A·h means 90 amps * hour

    so energ saved is 12 volts * 90 amp * 3600 seconds

    = 3888000 j

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