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Forum battery converted to usb power
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battery converted to usb power

Former Member
Former Member over 14 years ago

hello community, i was wondering if u could help me.

 

recently i have bought an mp3 player that runs of batteries, it has a usb port but only for data signals

now i was wondering if i could use that port to charge the device as well, is there any way to do this?

help would be much appreciated because i'm stuck on how do this.

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  • Simon66
    Simon66 over 14 years ago

    What you need to do is find the + and - on the USB connector on the mp3 and find a way to hook that up to the batteries. I'm not much of an electronic guy, but that's what I did for my last build, and it worked just fine.

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  • Zaragon
    Zaragon over 14 years ago in reply to Simon66

    Be careful though about how much power you draw as it could overload the bus and stop other devices on the bus from working. If you are plugging it into a computer it may not work if the computer is off.

     

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  • jvdberg@ieee.org
    jvdberg@ieee.org over 14 years ago in reply to Zaragon

    You must add a circuit to prevent overchargeing of the batteries. When the batteries are fully charged, the charge current must stop. Overchargeing will destroy the batteries. Lithium batteries can start a fire when overcharged.

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