YOJOCK USB C Tester USB Power Meter 2 in 1 Digital Multimeter 3.6-32V 0-8.0A Voltage and Current Tester Meter, Type C USB 3.0 Voltmeter Battery Capacity Volt Ammeter Power Bank Charger Detector

Purchased this to test the USB-C ports on my Mac and phone after experiencing charging problems. The tester provides clear voltage and current readings, which made it easy to identify whether the fault was with the cable, charger, or device port. Having both USB-C and USB-A support is very helpful as it works across all my chargers. Straightforward to use and very informative. A useful diagnostic tool for anyone troubleshooting charging issues.

I did pay for this myself and it isn’t part of the Amazon Vine Program. I do have one of these under another brand but needed a 2nd one and this looked the best value at the time. These do seem to be generic, with some having a brand name on them and others don’t. As I test a lot of charger and cables, these are really great for seeing what is happening vs. the spec. Where this differs from similar products is that you can go from USB-A to USB-C and visa versa. I have another design that, if you plug one end into a USB-A port, then the other end must also be plugged into a USB-A port as well. Personally, I find that too restricting. You can change the display arrangements but some are tricky to read due to the amount of info it’s displaying, that is unless you’re up close. I tend to focus predominantly on a setting which shows me Volts, Amps and Watts at that time and ongoing. It is easy to use and the display is clear, if a bit small sometimes. You even get a Micro-USB adapter included and a simple plastic storage case. Pricing on this specific design does tend to fluctuate quite a lot depending on the brand, I paid £16.74 for this one, but have seen these (not this specific one) for £25 upwards. For the price, I thinks it is decent value and highly portable. I did run a comparison test compared to the other one I had, they are exactly the same device, and the readings were the same on both. I hope you found this review & photos interesting, informative, and useful. Thanks for reading.

Proving to be really useful at identifying which chargers and leads are capable of delivering a reasonable output charge to our devices.

Very clever little tool

Something like this is great to have around to test the quantity of energy delivered throughout the cables or the plug ....

Works well.

Outstanding..well chuffed with it..👍😁

It lacks a USB C socket for input, so was useless with a USB C, plug-ended lead, like a USB C PSU with permanent cable, like for Raspberry PI, or when it is not practical to directly plugged in to a USB C power socket, because it's the wrong place or otherwise impractical. It seem that I will need to find/make a USB-C socket to USB-C socket adaptor, with PD support, for such situations, which was annoying, so I dropped 1 star! Update 2025-12-02 Correction: I discovered that the confusingly labelled "Type-C OUTPUT" can be used as a power input (e.g. a charger) and "Type-C INPUT" can be use as the power output (e.g. a mobile), so the suggested need for adapters was incorrect. The recorded duration was useful to see how long a device took to charge.

Funciona a la perfeccion, para saber la carga de diferentes cargadores que tenia por casa y en la oficina, asi puedes comprobar si realmente cargan a la potencia que dicen. Da mas informacion de la que necesito, es muy completo y esta hecho con calidad, buena compra.

Gebruiksvriendelijk, nuttige informatie over laadstroom, lader capaciteit en over ondeugdelijke kabels!

Wszystko OK , działa jak powinno , polecam Ogólnie mniej niż doba od kliknięcia i przesyłka była dostarczona , szok!

Underbar sak som gör sitt jobb väl. Där ser man om det drar någon ström eller inte laddar alls. Bra verktyg.

It is working now, it looks very good, for how many days the display and device work well ❤️‍🩹