Prior versions of the Pi 4 wouldn't work with high-speed, e-marked USB charging cables.
Raspberry Pi 4 Revision Fixes USB-C Compatibility Problem : Read more
Raspberry Pi 4 Revision Fixes USB-C Compatibility Problem : Read more
Not to nitpick too much, but just FYI, this fix is on the model B. The model A hasn't come out yet (who knows if they'll even make one). Models aren't the same as revisions. The A models are usually stripped down versions, relatively few are sold. In fact, if you look closely at the PCB in the photo you'll see that is says RPI4B in several places.