I bought a Pictek fast-charger a week ago (single round plate). Does work. But, unlike the "fast-charing Samsung branded plug/USB-C cable" there is no readout on the screen to say it's charging nor on the cover of my Samsung LED case. Why? Does the cheap Samsung branded supplied "fast-charging plug" put out more power?
I know the Samsung Duo Charger will give a readout on the phone screen and likely on a Samsung LED case.
What is it about Samsung branded products that make them work as they should with Samsung phones like my Note 9?
I know the Samsung Duo Charger will give a readout on the phone screen and likely on a Samsung LED case.
What is it about Samsung branded products that make them work as they should with Samsung phones like my Note 9?

that's the way the manufacturer's design them.