In article , Chris Green   wrote:
>All I'm saying is that the USB standard doesn't provide even 2 amps.
>Thus a 'USB' cable that conforms to the USB specification doesn't need
>to be able to carry that much current.
>
>If a Pi requires more than the USB specification allows then its power
>supply *and* cable are "more than USB".

We blew past the 500 mA limit long ago, well before the introduction of the
Raspberry Pi.  The iPhone was out 5 years earlier and needed 1 A for
full-rate charging.  By the time the Raspberry Pi was introduced, there was
a rather large field of devices needing 1, 1.5, 2, or more amps to run
and/or charge.  The tricks used to signal current draw with only passive
components have even been added to the USB specs, so they really aren't
"more than USB," as you put it.

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