Klein Tools ET920 USB Power Meter, USB-A and USB-C Digital Meter for Voltage, Current, Capacity, Energy and Resistance

the Klein Tools ET920 USB Power Meter, USB-C and USB-A Digital Meter for Voltage, Current, watts, resistance all work great, just plug it in look at the screen, very easy to use. the graphics are not great but work with no problems, so many review say the USB-C does not work, the USB-C will not work on apple dc power USB-C device do to apple non standard USB-C dc power wiring the klein meter will not work, also the meter has usb input and output that must be correct or meter will not work properly. USB-C works fine with the standard USB-C DC Power wiring. Film and TV Engineering for 25 years.

Absolutely terrific, was able to measure a couple of USB-C wall chargers that were not rated as specified! Saved me a ton of $$s already.Thank you to the other reviewers who pointed out that the USB-C needs to have load on it prior to connecting the input to the power providing charger. USB-A is automatic. In any case, works well.The only thing I would ask is if it can also provide Watts on the display! (it does provide mAH and wH, for watts, have to just multiply Volts x Amps). A bit expensive, but well worth the ease of use. Highly recommend.

This is a pretty nice USB power meter. I have a very simple USB-C only power meter that works well, but it doesn't have any leads, so can sometimes be hard to plug in. Also I wanted a power meter that also did USB-A. Klein Tools is a great brand, so got this USB power meter. It works well and has plenty of features. It has a lead on one of the USB-C ends as well which helps with device arrangement. But it does have a draw back: USB-C is generally the same plug on both ends, and as such the devices can determine which ones supplies power and which one is the sink. But this power meter in USB-C mode you need to put it in the right direction or you get no amperage reading... seems like a weird design flaw.

If you attach the meter to a USB C charger, you would expect it to work just like when you attach it to a USB charger or port.I thought my meter was broken and the USB C cable did not work.I used an Apple USB C charger for this test.Sure enough, nothing happened and the meter appeared broken on delivery.Since I am an engineer I ask technical question and make technical tests. (politicians and shrinks hate me)I asked, what if the charger has a sensor to detect an attched device to charge?The answer is, YES, some chargers do have a sensor to detect an attached device and they do not supply any current until a device is attached.This is true for more than just chargers.USB C is somewhat sophisticated.Once I attached a laptop to my Apple charger through the meter, everything worked perfectly.When using the USB C cable on this meter, make sure you have something attached that draws current or it will appear the meter is broken. (no current is supplied to the meter for it to work)The standard USB cable does not require that.

This USB power meter is very versatile, allowing me to test voltage and current in USB connections. It can measure voltage from 3 to 20V DC and current from 0.05 to 3A (USB-A) or 0.05 to 5A (USB-C). This wide range covers most standard USB ports, including Qualcomm Quick Charge ports. With it, I can measure and display important information such as USB port voltage, current, capacity, energy, and resistance, providing valuable insight into my USB power usage on various devices.My only minor gripe is that the meter instantly shuts off after a low current draw or power cycle, rather than retaining the data. It would be more convenient if it saved the last reading for a short period.It's important to note that USB Type-C connections operate with efficiency and safety in mind, meaning that the charger will only supply power when it detects a device connected to the other end. If no device is connected, the power meter will not power up as it doesn't receive any power from the charger. This feature prevents unnecessary power wastage and reduces potential electrical hazards.---Product: Klein Tools ET920 USB Power Meter, USB-A and USB-C Digital Meter for Voltage, Current, Capacity, Energy and ResistanceASIN: B07GXZHPVR

Ever wonder how much power your USB charger is actually providing to the device? I sure have. Place this device in line (plug meter into charger port, device to be charged into the meter) and it will immediately light up and report how many volts and amps are being consumed. It also reports how many mAh and Wh have gone across the meter and over what period of time. There's a minor restriction in that the meter has to be across either the USB-A or the USB-C side entirely, meaning you can't plug the meter into USB-C and then charge something that's USB-A or vice-versa. This is no big deal in practice, though. It even has a memory!All in all it's a very cool device and I'm glad I have it.