Why do those usb fans make my samsung s9+ shut down? I had one for my s4 that worked (micro usb) but the one for my s9+ doesn't (usb C).?

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  • cosmo
    Lv 7
    2 months ago

    Many devices that take power from a usb port take more than the usb specification allows.  Sometimes this works, and sometimes it doesn't.

  • Lv 7
    2 months ago

    cheap parts don't work well. phones were not designed to power external devices.

    that they CAN is just happenstance.

  • 2 months ago

    Probably too much current draw for that "samsung s9+" that craters the power on that USB-C port.  I guess there is a shorting going on.  Pin configuration is different on the "C" version--the plug can go in flipped in either direction.  That is because there is "hot--ground--data1,2,1--ground--hot".  The old USB is "hot--data1,2--ground"

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