MakerHawk USB 3.0 Tester USB Power Meter 3.7-30V 0-4A Voltage Tester Multimeter USB Current Meter IPS Color Display Voltmeter Ammeter Charger Tester AT34

I received 2 of these for Christmas 5 months ago. I am in no way associated with the company, I just found a good product and would like others to know. Features: you can turn off the screen, change between °C and °F, it records how much power was used, you can access multiple records of power usage, data transfer is unaffected. It reads between 3.6V to 5.4V (so far), however the screen turns black when usb-c fast charge exceeds ~6V, though it is very temporary and limits 9V to 5v usb-c. In general, the amps (blue) read between .001 to 2.8, yet to see 3+. The higher the amps are, the faster the charger. I use it to determine how much power many different chargers use, both in amperage and watt-hours of capacity. I also use it to find the best angle to place my usb solar panel, which is often straight up on a cloudy day. It is seated well in the housing, not wiggling or sliding around like my green thumb drive(hence the glue). It also comes with a usb plastic cap for the male end, and a folding plastic case, though it’s durable and I carry it without the case to save space. This is accurate, i tested it with a 22Ω+ 10Ω resistor in series to make a higher wattage 32Ω resistor, along with an ohms law calculator to compare. The meter read 32.2-32.4 ohms, which is very respectable (usb cable has a little resistance) and the other math checks out as well. I read how some have inaccurate meters, but I guess it’s been fixed since then. Overall, if you want to check how fast something charges, what voltage your charger is at(safety shut-off), how much power is consumed, and even the resistance of your charger+battery, then this is the meter for you. (Yes, that does seem kinda staged like an ad, but it is a good product)

This is a very nice USB tester which seems to be quite accurate. Large display that is easy to read. I like the various option available, like being able to rotate the display 180°, voltage, amps, watt hours, etc. I will probably end up ordering another.

The MakerHawk USB 3.0 Tester measures USB port direct current voltage, direct current, milliamp-hours, milliwatt-hours, and temperature in degrees Centigrade. It is simple to use: just plug in the USB device under test in one end and the Tester in the PC's USB port and the results are presented instantly on the built-in color display. Is it accurate? Probably accurate enough for most requirements. The price was low and the value was sufficient. As I said in the headline, it does the job, what more do you want? I recommend the MakerHawk USB 3.0 Tester for these reasons.

Works great, just plug and play to monitor charging progress of batteries of some portable radios. Used it to troubleshoot a balking charger. Fair price, good value.

Great tech tool

I never knew how much use I'd get out of these. This device is extremely helpful in monitoring current usage on Arduino projects. It's also helpful in troubleshooting bad USB cables. Some cables work great unless you move them a bit. The accumulative mAh allows estimations on battery charge/discharge times. It has two "data modes" (ads terminology). One will store mAh until you start passing current through it again. Plug the power meter in, and you see the last reading. Start passing current though it, and the reading zeros out before accumulating mAh again. The second mode holds accumulated mAh until manually reset. It will always accumulate until it's reset. They work independently of each other. As in, second mode does not accumulate while mode one is selected and vise-versa. Another useful feature is being able to turn off the display to conserve battery power. You can also flip the display as needed. I've found this useful at times for easy reading. The larger numbers are approximately 1/8" tall.

Love this thing. I like being able to test the output and input to some of my devices to make sure they are getting what they need. easy to use. easy to read the voltage.

The MakerHawk USB 3.0 tester has exceeded my expectations! Its accurate voltage and current measurement capabilities provide valuable insights into the performance of my USB devices. The compact design and user-friendly interface make it a breeze to use, allowing me to troubleshoot and optimize my setups effortlessly. This tester has become an essential tool in my tech toolkit, and I highly recommend it to anyone looking for a reliable and efficient USB testing solution.

Bien utiles pour les initiés et autres curieux. J-M Coutaud.

Trabaja muy bien.

Me gustó para verificar el consumo de mis dispositivos USB. También lo he usado para verificar la carga de las pilas de mi drone.

USB power meter works fantastic worth the money

Good display; need a magnifier