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.

A really great little gadget. I guess I’m like most people, over the years you collect a large number of cables. This will test and compare so you can keep the better ones and recycle the poorer ones. Have you ever wondered why some cables charge better than others, this explains that. Works both full USB and the newer, smaller USB C plugs

This is a useful little tester for measuring power consumption of USB devices, whether Type A, Micro-B or C. The display is nice and bright and easy to read, and there are a number of display options to choose from, including live graphs. If you're unsure whether a USB charger is outputting what it should be, or if a device is requesting a fast-charge when it should be, this is an inexpensive tester that'll help you find out.

Very good USB connection tester. In my case, I was able to prove voltage connection but no data and0 subsequently work on fixing the issue.

Seems to work as advertised. A few (positive!) things to call out from the photos: - The USB-C connection is reversable from the labels, as USB-C is bidirectional. You can see in the photos I've connected it "backwards" and the device is showing a small green arrow for the current flow direction. Helpful for having the reading up by the device, not down by the charger. (USB-A is always socket-powered, so you won't be able to do this. The inverse is true for for micro-USB, which has an adapter for on the A-output side.) - The timer saves the elapsed time even when unplugged. The middle shot with the laptop charging has just been plugged in, but has remembered the time spent charging the phone. You'll need to reset the timer manually if you care. - The timer stops automatically when the current flow stops. So you don't have to watch like a hawk for when charging stops to measure the total time. - The device detects (and doesn't interfere with) quick-charge standards on this Android phone and Chromebook. You can see tiny "QC 2.0" and "FAST/PD" text on the display, and that the phone is showing "charging rapidly". Updates: - It passes data! I have a USB programmable microcontroller for LED strips, and it works plugged in through this. I *don't* know if caps speeds. - The current reading agrees with the on-device current reading that controller gives. So it seems to be calibrated properly.

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.

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 ❤️‍🩹

Un peu fragile, surtout le petit connecteur usb-a. Sinon interface complète et précision en rapport avec d’autres appareils de même type