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.

Like said in the headline and with the attached pictures. I plugged it into the charger one day with nothing attached to the meter and it did a strange reset, followed by a frozen screen. Shortly after it reset but now the voltage reading is way off. Reading ten from an adapter that puts out not even six, pretty disappointed. Hopefully someone can explain and or rectify this UPDATE! Bringing the review up to four stars and possibly even five. I do actually love this meter. Before it somehow glitched this thing was tops blueby. Very accurate, and the color screen is an awesome plus. Only thing I miss from other meters is a timer to monitor stuff but for all the other features I can live without. Now like I said mine glitched and somehow started reading the voltage wrong. After contacting the company through email and explaining this and providing pictures they agreed it's defective and are sending me a replacement without need to return the other one. So hopefully I can return with another update soon and five stars as well

Have you ever plugged your device into a charging source and just couldn't figure out why it wouldn't charge well/fast? Is there an issue with your device? Is it the charger? Does the charger really output what it says it does? Well, we have various models of chargers all over the house and several devices to charge (from iPhones to iPads to wireless headphones), and the chargers/ports seem different (some really weak). With this device, I can tell for sure. It's super easy to use and read. I'll be going through through all our power stations (and probably ditching a few) at this point! Great little product (especially for the price!).

This unit works reliably and has decent resolution for current and voltage. Accuracy of current and voltage is reasonable enough for what it does! I like the feature that allows you to flip the display 180 degrees.

This gadget is both fun and functional for tinkerers and curious minds. There is quite a bit of usefulness packed into this device, which has exactly one control. I originally wanted something like this to keep tabs on current flow when I'm charging devices. This does that, of course, but there's so much more one can learn from. I quickly realized some USB ports are better at keeping up a proper charging voltage than others while under load. With this I can now get a measure on how much charge capacity things have. Now I know that my 2200 mAh USB battery is actually a 2350 mAh battery (surprise!), and how long it will run the cat's water fountain when the apocalypse comes. So much to learn! I do wish the current readout was a different or brighter color, as it's hard for me to see that in my environment, but this is a minor concern.

This blows other multimeters out of the water in terms of features. I bought it because it had 3 digits of precision for amperes but I was pleasantly surprised at the ability to meter power used with two pages of memory, an included thermometer, a vibrant and easy to read screen, and included wattage and resistance. I could see this being handy installed as part of a larger installation such as an outdoor camera or USB thermometer so that you can easily measure power usage, temperature and so forth over time. Probably the best value I've gotten out of a product in a long time.

This is for the USB Tester sold by MakerHawk-US. I signed on tonight so that i could rate this device because it is that good. The device measures current and Ampere Hours plus other parameters. It works very well and shows me the current draw of the devices i use in the USB port. I was able to detect that the battery in my phone was bad because the charge current shown on the device never went down below about 445ma which is not normal for this phone. Normally it does way down when the battery is fully charged. Sure enough i took the battery out and it was swollen. Swollen batteries are dangerous so it is very very good to test for this. I use the device all the time now. At first the seller only sent me one device when i was supposed to get two, but they made good on it the very next day after i contacted Amazon and got the second one the next day. I rarely see devices these days that i like this much so i cant help but highly recommend it.

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

Trabaja muy bien.

USB power meter works fantastic worth the money

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

great little device that shows the voltage and current drawn. helps to detect faults with the usb port or with the charging equipment. Unfortunately doesn't support USB-C