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As you're touching on, it doesn't make sense to make a blanket statement for all phones. Also, iPhone is not USB-C, so I guess it doesn't participate in this ne

As you're touching on, it doesn't make sense to make a blanket statement for all phones. Also, iPhone is not USB-C, so I guess it doesn't participate in this negotiation.

wongarsu 4y ago
What about Lightning to USB-C cables? I assume the device is talking the USB protocol at that point? Or does that connection only allow charging in one direction?
- mathieuh 4y ago
  I've charged my iPhone off my MBP using a lightning->usb-c cable and I didn't notice anything weird. I've also been able to charge my iPhone off my iPad using the same cable so maybe it is one way.
  - dfox 4y ago
    That particular cable only works in one direction. Lightning itself can power external devices, but the whole mechanism is completely different than how USB PD over USB-C works (it is designed for low power peripherals and thus can output unregulated 3-ish V in order to save on DC/DC conversion losses, similar capability of devices powered entirely from V_CONN is quite recent and hackish addition to USB-C).
karmakaze 4y ago
I forget that other interface still exists. Is it only iPhone and keyboard/touchpad/mouse/pencil now?
- TheHappyOddish 4y ago
  AirPods too.