This tester is everything you need to test USB-C ports, chargers, and power banks, and at a price that's not going to break the bank.

Test resistance To gauge the quality of the cable, I use a four-wire, milliohm meter attached to the cable using USB breakout boards on the VBUS and ground wires.

For all of you who have a multimeter thrown in a drawer or toolbox but don’t know how to use it, these instructions will help in your search for missing voltage.