Charged or discharged

Discussion in 'Physics & Math' started by Thinh Nghiem, Sep 28, 2016.

  1. Thinh Nghiem Registered Member

    Messages:
    4
    Dear all,
    I have an amusing experiment with my smart phone charger. That is, after charging it fully, I connect its input and output toghether, and get surprise result.
    Could you see in my youtube clip and give your explanation here

    Thanks
    Thinh Nghiem
     
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  3. exchemist Valued Senior Member

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    6,644
    You need to explain , in words, what you found when you did this and why you find it surprising.
     
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  5. Thinh Nghiem Registered Member

    Messages:
    4
    This is a simple experiment. The device here is a charger which I use to charge my smartphone.
    First of all, I charge it fully. Then I connect the input and output toghether with a cable.
    I see the red light as if it was charged. But actually it was discharged and finally all of its energy was out
     
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  7. billvon Valued Senior Member

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    12,825
    This is not "surprise result." It is basic thermodynamics.
     
  8. Daecon Kiwi fruit Valued Senior Member

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    The phone thinks it's charging because you have a powered cable connected to its charging port, but it's expending energy on producing light and such, so eventually it'll run out.
     
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