ChargerLab's Power-Z KM003C USB-C meter.
Adrian Kingsley-Hughes/USB testers have gone far beyond just testing the output voltages and power of ports, and can now test and check for counterfeit Apple chargers and cables.
I have dozens of different testers, but undoubtedly the most powerful isChargerLab's Power-Z KM003C USB-C meter .
Also: This is the ultimate iPhone car charger, and I just fixed its biggest problem
This can tell you anything and everything you need to know about a USB-C port, cable, or charger.
A powerful USB-C tester that includes all the normal functions you'd expect of a USB-C meter (such as the ability to measure voltages and current), but also adds features such as Apple charger and cable testing
View at Amazon