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Homework Help: Energy stored in a battery

  1. May 26, 2013 #1
    Hello All,

    I was wondering if anyone could check this since I am not very good at physics (understatement).

    Thanks a lot! :smile:

    "A 1.5 V battery is rated at 1,800 milliamp hours (mAh). This means it can suppy a current of 1.8 A for 1.0 hours before running out of charge. How much electrical energy (in joules) is stored in the battery when it is new?"

    My solution:
    Δq=J(Δt)=(1.8A)(3600s)=6480 C

    E=q*(E/q)= (6480C)(1.5V) = 9.7*10^3 Joules
  2. jcsd
  3. May 26, 2013 #2


    User Avatar

    Staff: Mentor

    Your calculated value looks good.
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