There really is nothing called "USB-C" in the context you're using
it. "USB Type C" is just a connector SHAPE. Its not even a given
that it will have every pinout inside, and teh cable will have
even less than the max it supports. It has absolutely nothing do
with charging in itself (at least any more than say, a SCSI or
RS-232 connector - which can also be used for charging).
Tell us, David - What's at the other end of that USB Type C cable
that you use to charge your phone or Chromebook? It's usually a
USB Type A connector. OOPS! There goes your "USB-C charging
theory". We'll just file that in the "Ambiguous" file cabinet.
Most of the recent chromebooks and phones, however, do come with
USB Type C connectors for charging. But they are not the majority
of active charging connectors for laptops. And the ones that do
have NO STANDARD except a loose "Fast Charging" capability. These
devices run between 15-90 watts, 1.5 to 5 amps, and in either 5,
9, and/or 12 volt configurations. For this reason, Chromebooks
and laptops (and some cell phones) will ALWAYS COME WITH THEIR OWN
charger and a cable too. Because your "defacto standard USB 3.x
Type C" or even wall adapter cannot handle the max power load of
the new devices and their maximum charging capabilities. Phones
are a little more forgiving with their smaller batteries and can
fallback just fine. But if you're not using the adapter and cable
that came with your Chromebook or your laptop's Type C charging
port, then you're probably blowing it. I iPhone and the newest
Samsung products dont' come with chargers, but they will not
charge their fastest potential with older Samsung chargers, nor
will the IPhone 15 charge with the most common Samsung fast
charger (which is 9v 1.67a 15 watt).
Anyway, point is that there is signifiantly less of a "defacto
charging standard" now than there ever was when it was only USB
1.x and 2.x with type A, Mini, and Micro connectors. And USB 3.0
with any connector and only 1 amp still won't charge anything very
quick. You can't just mix and match, type C connectors to any ol
cable that will fit the power source and device and expect to be
able to charge your device.
If there was, I wouldn't have strung all these power cords and
wires from my live PC power supply out through the front panel to
use as electricity for whatever I'm working on at the moment. I
practically every connector there is somewhere in this tangled
mess, with my choice of 3.3, 5, 9 (VIA 9V battery back-fed through
all other connectors), 12, and I'm working on 24V... but no USB
type C connector (only OTG cables with USB Micro connectors).
https://i.postimg.cc/76tFSYfs/Tower-of-Power.jpg
Yeah, I should really get a standalone PC power supply. It's the
only thing I usually don't have extras of.
-sw