• RedGreenBlue@lemmy.zip
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      51 minutes ago

      It’s part of the standard. It’s slightly different for each USB verision. USB 2.0 starts at 100mA at 5V and the device can negotiate up to 500mA, if the host can deliver.

    • InFerNo@lemmy.ml
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      6 hours ago

      Usb is 5v standard, it can negotiate something else, then it’s called usb-pd