YZXstudio USB-C Power Meter
The YZXstudio USB-C Power Meter was my first solo Taobao purchase, despite my limited Mandarin. It cost about S$33 plus S$6 shipping, but as a sensitive item it only ships by sea, taking nearly a month.
YZXstudio
YZXstudio USB power meters and testers for measuring voltage, current, and charging output.