Chris Green wrote:

> All I was originally pointing out was that it's (very) often the cable
> is the issue when running a Pi, you can have a very capable power
> supply but if the cable isn't good enough it's not going to work
> reliably.

might be true, but in my opinion it is exaggerated (I think it is the right
word in English). A cable is a copper wire to help electrons pass through.
What else can go wrong with the cable? It will just melt down :)

But if I am not wrong for a cable to handle 5V at 2A with length of 2m and
drop of 0.5% the wire should be approx 6sqmm (diam. approx. 2.5mm) for 3A
it should be 8.5sqmm (diam. approx. 3.2mm).

Someone mentioned additional passive electronics in the cable - now this is
mean. At the end it might be best option to soldier your own cables :/
However the HP one is powereing the RPi4 just fine.
I personally assume the electronics would be in the power supply and in the
device.. AFAIK RPi would not run if there is not enough power instead of
melting the cable :)

No idea why you had such bad experience with powering from USB power supply.

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