AT085 USB C Tester

I would probably give it 4.5 stars if we had half stars. I like the device especially that it is bidirectional in that it can be plugged into the charger or the device. It is smaller than I had envisioned but the screen is easy to read. with large letters and high contrast colors. Edit after 6 months: I had. to buy 2 more. The information is addicting. I learned that USB-C power negotiates voltage, my iPhne goes up to 9.8 volts. We can judge the progress by how much power is being used with my power block I go up to 18.5 W and usually use 2-3 Wh for a full charge. Since everything seems to have a charging port these days I like to know their capacity. Yes we can get a good idea from how long it takes to charge and how hot the device gets but we techno geeks like knowing useless details. Even if the only use is where to plug in my phone for the fastest charge. ` The 2 buttons are tiny for us handicapped oldsters. They take a short and long press so 4 functions on 2 buttons. A little confusing at first but I just found the setting I like and don't see the need to change it. I don't have a calibrated meter to compare it but my iPhone draws 19.7 W from my 20W charger and 19.8 from a power strip with USB ports. A USB hub, my slow charger measure 7.4W. My Fire 10 draws 11.8 W. These are very close to what I expected. It is also informative to watch a device -charge to 100%. It goes to zero for a few seconds then charges for a few seconds in and endless cycle.making it clear why we should leave it any device plugged in long after charging is complete.

This compact meter works as described, reporting actual power transfer through a USB-C connection, plus a few other things like total energy transferred. It's super helpful to be able to measure actual charging power. You can test your power brick and charging cable to ensure you're getting the maximum charge rate your device supports. A big win against the chaos created by having USB-C cables that are not labeled for their capabilities.

Mostly, I use this to show whether a device is charging, and to show what level of USB-C power is being accessed. Good tool to have. In theory I could use it to measure the total W-hr charge has gone into or out of a device, but I haven't used that feture in practice. It includes a sensor that attempts to keep the dispaly reading right-side-up -- nice little feature.

Works as described. Cool color display and lots of metrics. Slightly larger making it not usable with some phone/tablet cases. Reason for 1 less star rating. Of course you can always connect on the other end of the cable or with case removed. If you plan to use in tight spaces, recommend picking smaller form factor items or items with cables (dongles).

This is a neat little tester. It's tiny yet does everything that I want it to do. I'm impressed.

Remembering which of the two buttons does what took a bit getting used to, especially while trying not to rock the port too much. But overall, it works exactly as you'd expect. Display is very readable. It even has a small arrow pointing which way the power flows. It remembers how much charge flowed through even while unplugged, turns out, that's quite useful. Tested up to 62W. What more does one need?

The displayed current varies a great deal. 0.85 - 1.00 amps when charging my watch, which should be a steady draw. I wouldn't trust the displayed values from this meter for more than a ballpark figure. It works both ways, which is convenient. You can put the male end into an AC adapter and plug a device's cable into the female side, which is how I measured my watch's charging, or plug the male end into a device and a cable for the AC adapter into the female side, which is how I tested my iPad. It works either way. It defaults to Chinese which is inconvenient. The buttons don't behave intuitively, you have to long-press for some actions. It's tiny as voltmeters go, 1" x 1.3" x 0.4", not counting the male USB connector, which is conveniently small. Overall, I think it's kind of useful for answering the question of "roughly how much power is my device getting from the adapter," but you have to keep in mind it's highly approximate. It also lets you see how power draw when charging a device with a battery tends to fall off with time, drawing far more when the device is nearly empty than when it's nearly full.

Digits in color, amps volts watts are large easily seen with a bunch of other parameters smaller on other page screens. No cables to wear out and break with direct connection

Makes troubleshooting electronic equipment little bit easier

Could be easier to use and understand. But overall a nice tool to have

Does what it is intended to do, namely measure voltage, amperage, and wattage. Accurate results when compared with more expensive test equipment. Please note that the USB-C standard requires that a load be present (i.e. input and output connected) in order to turn on and provide a reading. Changing the display language from Chinese to English was frustrating and time consuming with the vague menu selection buttons. Small, yet clear display.