I don’t think USB-C charging can be universal across devices.
This is not a charger or cable issue, but the manufacturers of basic consumer products do not set their devices with proper power negotiation circuits. Not much can be done in cases like that.
I think the issue is the basic consumer products you are attempting to charge can only charge a 5 volts at 1 amp (5W) and cannot negotiate with a higher wattages wall charger.
I say this without having solid specs on this, but I personally have converted to all USB-C items on my MacBook Air and have some items that can technically charge via USB-C but only do so when I connect them to a 5W USB-A charger. Items like a no-name “Aidisun” bike flashlight and such.
Look at what your KOOPAO (!?!) can charge at:
USB-C PD (Power Delivery)
- 5V/3A: 15W
- 9V/2.25A: 20.25W
- 12V/1.67A: 20.04W
USB-A QC 3.0 (Quick Charge 3.0)
- 5V/3A: 15W
- 9V/2.25A: 20.25W
- 12V/1.5A: 18W
Nowhere does it say “5V/1A” but somehow that comes through with the USB-A connection?
It baffles me, but my bet would be that all of the consumer products you mention:
- Xiberia G01 Gaming Headphones
- Bose QC 45 noise cancelling headphones
- Momcozy white noise machine
While they might have a USB-C connection, they can only work with USB-A connections because the manufacturers somehow did not set their devices with proper power negotiation circuits? They are effectively “dumb” USB devices that can only take what they are given but only if not above a certain (5 volts at 1 amp) wattage?
I wouldn’t waste time with new cables or even a new charger. Sorry to say, I don’t believe the promise of USB-C charging across devices exists. Especially when makers of USB-C chargers and devices that claim to be cable of USB-C charging are so opaque about power requirements.
FWIW, I just tried this out but if I connect a USB-A (Male) to USB-C (Male) to a USB-A (Female) to USB-C (Male) adapter I can successfully charge by crappy “Aidisun” bike flashlight. According to my USB-C power meter, power is sent at 2.5W (5V/0.5A) which is pretty low.
So I wonder if this the case where some consumer devices that have USB-C power adapters charge at 2.5W (5V/0.5A) but somehow can’t negotiate with higher wattage AC adapters? Like if it is less than 5W (5V/1A) on pure USB-C to USB-C it doesn’t know what to do?
My guess is your USB-C to USB-C charging problems won’t go away with a new AC adapter because the problem is ultimately with the consumer devices themselves.