USB Power Meter Testers, ELECTOP Upgrade Multi Functional 2 in 1 Type C USB Tester, LCD Digital Multimeter, Voltage,Current, Power Capacity, Temperature, Working Time Detector (Pack with OTG Adapter)

I am totally satisfied with my purchase.

Tenía problemas para saber cuáles servían y cuáles no. Ahora se cuantos Amps da cada uno y pude deshacerme de los inservibles.Un tester infaltable en esta época en que los cargadores u adaptadores USB son parte de nuestra vida cotidiana.

Want to feel like a revered computer hacker on a Hollywood TV show? Go ahead and just stick one of these in between your cell phone and your charger or whatever. And every time you do it will light up and you'll see these cool digital numbers scroll with their different warnings and colors, and the people riding in your car with you see you do this and they realize that of course you don't just plug your cell phone straight into the USB port, because that's what uneducated sheep do. You are obviously aware of the secret digital forces that drive our world and you're one of the few people who's keeping an eye on it. Don't push the narrative too hard, just let it happen. That way it could last for years or decades. I love running into people who tell me oh my gosh I thought you were the smartest coolest in most connected person I ever met because you couldn't even charge a cell phone without checking to see what was really going on

Handy little device to determine power usage of the USB device.

Seems to be quite accurate. Small font is hard to read but it’s sharp so using a little magnifier works. Just keep pushing the button and the language will switch to English and the volts & amps will become a readable font size. Tried both USB A & C but don’t have a real C device right now. Both worked fine. I’ll update this if anything changes.Always remember that most USB A cables over 3ft WILL NOT charge your device at full power. Unless you’re careful to buy larger gauge cables, that’s all you get. The shorter the cable, the faster the charge. The cable drops the voltage as much as 25% by the time it gets to the phone and therefore the current is also reduced the same % so power (volts x amps) actually supplied is drastically reduced. A USB C power supply with a USB C device will do much better since it starts out at 20v instead of 5v. Don’t blame the USB A power supply. It’s regulated to 5v. If you just plug this tester into a power supply with no load plugged into it, you can see that the power supply is properly regulating. Then plug in the load. Voltage will usually drop a few 1/10 of a volt and current (Amps) will flow. The tester measures the actual current (amps). But the voltage is measured AT THE POINT IN THE CABLE it is plugged into - not at the phone or other device. It drops as it gets to the device.

New technology requires new hardware to test. I use to use a USB A to micro USB tester which worked fine but now with the advent of USB C, this requires different hardware. It's not even that it's just a new connector but rather the Power Delivery (PD) standard which should be testing. Battery banks are starting to advertise this connection and feature so testing it out thoroughly helps. I got a "USB C" battery bank that doesn't actually support PD which sucks. It's just a big power bank that can charge at conventional USB current and voltage. Nothing special about it. I might as well have gotten a USB A to C cable.I compared my laptop charger and laptop using this USB tester and everything checks out. I can then use this to compare no name branded products without worrying (as much) about frying my devices. Very possible still in this day and age. The only drawback is that the readout is static based on where the USB plug is. A USB meter with a dongle would work differently so I can plug it in somewhere and just turn the display as required. Both have their advantages and drawbacks. With a cable, the wires and wear out and cause problems in itself. The lack, therefore, means fewer sources of problems. The display is easy to read and colorful which is a big bonus. The fonts are a bit small though and for my old eyes it requires some adjustment on my part. Otherwise it's accurate and easy to use.

I do enjoy the product for what it is designed for and I really like the readable wattage, voltage, amperage, and other readouts. That said I felt compelled to write a review not because of these features but because of the damage I caused to my electronics while using this device in a manner suggested by the attached pictures. I was using the device to see how fast my device was charging and found it accurate. I decided to try out this USB OTG feature advertised above by plugging in a USB keyboard. Now this may have worked in a normal situation however my usb charger was supplying over 15v and many amps. This of course is not to usb a spec of a normal keyboard but instead of regulating the voltage on that port it puts the full wattage through which nearly caused my keyboard to catch on fire leaving it broken and ruined. Looking back I should have realized this had a strong possibility of happening but especially when this is advertised as USB PD compatible it shouldn't suggest you use the usb on the device to connect keyboards or other normal decives as it could cause serious issues.

Lo compramos para una medición de un Rasberry y lo empezamos a usar con varios cargadores, es muy bueno y fácil de usar, a veces si te pasas de una presión del botón es un tema dar la vuelta, pero no es problema, fácil de usar, de leer y practico.

If the Vendor Manufacturer/Designer/Programmer should happen to read this adjusting the time constant threshold of a long press up to about a second would be far more usable/reasonableTo those of us not included above:The instruction sheet That came with the unit must have been for an earlier iteration....... The Display/Reset labels on the unit are pretty much irrelevant too.a good starting point is getting the picture on what constitutes a long and short press. It appears that a"long" press threshold is actually anything loger a half second or slightly less and on to eternity.has no further effect. It cycles through the various display layouts and at one point sequentially displays three setting defaults. I have had no reason to alter those bu I believe that short presses while the values are displayed will change the values ( the 35 value could be a lot of presses (. The end of the sequence lands on a totally blank screen ( IT HAS NOT Died!) and you need one more "long" press to get back on the map.A short press is shorter than you would likely expect. B by now you have likely cycled through all the screens mentioned above and have not reset any values............Short presses are VERY short indeed. 3 of 4 cans of Red Bull should get you up to speed ,,,, You need to get all of the insanely short presses with no pauses to speak of in a burst for them to be recognized as what you had in mind......The table below tells you what various numbers of presses/burst will do:# of short Resets presses in to 0 a burst1 PWR2 Cap3 Ene4 TimeSo now that you are all set to go does anyone have a clue as to what the ting PCB/Addapier that was in the MicroULSB Input between Type C and USB inputs is for? It appears to fit in USB connectors of both sexes but somewhat sloppily which I would assume I had the wrong end of a MicroUSB cable but can;t conceive of any occasion that would otherwise require it......Has anyone cracked one of these open to find out what processing chip(s) are used?I hope I may have saved a lot of people some frustration"Easy to read" lost a star as anything with type that small can't be read with my vision at this age... I think enough has been said above to account for the :ease of use" rating|!!!!!!!!Beyond all that It appears to actually be accurate and once I record the data screen by way of taking picture with my phone and expanding it I can read and save the data for anything I monitor with it for future reference.I would expect that a lot of these go back as DNFW due to the directions and press timing ssues.I would revisit this review if reasonable and correct directions came with them ( Reasonable sized font please ) but NOT unless the timing factor is addressed........Bob

The unit works as advertised when certain precautions are taken. Upon receipt, I plugged the unit into my computer with a solid state hard drive connected on the unit’s output. The display lit up, readings registered the SSHD power ratings then it went through a reboot - flashing the welcome screen. This repeated until I supported the unit by hand, holding it firmly against the laptop then with folded paper wedged underneath to keep it level. For good measure, I tried the other USB ports on my laptop with similar results.I don’t have issues with thumb drives nor with any of my external hard drives connected directly to the laptop’s USB ports. I did realize however that the USB Power Metering Tester I had received has a loose fit and the weight of the cord, as minor as it is, is sufficient to intermittently break the electrical connection. A minor inconvenience I’m willing to live with and won’t be going through the trouble of returning it.As previously noted, the tester does work when appropriate steps are taken. Perhaps this is one isolated issue or maybe it’s a design/ manufacturing flaw but in either case, I felt it’s worth sharing should others experience the same. FYI........

I have many electronic devices such as computer mouse, calculator, mp3 player with rechargeable means (such as batteries/capacitors) inside them and has no charging indicator. I charged them over my laptop's USB port. I wanted to see whether these devices are being charged in full and also to see their remaining life. So, I purchased this measurement device. During charging, this device indicates that the voltage is less than 5 volt (but close to 5 V) whereas the current (electron flow) changes. When charging stops, this device indicates 5 volts and zero amperes (electron flow stops) and this means to me that the electronic device has been fully charged. This device also has wide range of measurement scale. It has USB 3.0 and USB-C input/output ports so that you can connect wide variety of electronic devices to it. I named just two specs here. It also measures mAh, etc. I like this device. I think whoever is doing lots of charging activities should own one of this measurement instrument.

It seems to work, but is very inaccurateUnfortunately, the easiest charging brick for me to access necessitated plugging the unit in upside-down, which makes reading it a literal pain in my back. It's hard to gauge how accurate it is, since said charging brick is a 4-port BlackWeb, but it seems to read 1.45A charging current on my Razer Phone 2 regardless of whether it's plugged into a 2.4A port or 1.0A port. I'm not sure if that indicates a problem with the unit or the charging brick, but when I tried with a QC3.0 charger at 12V 1.5A, my phone started charging rapidly and the unit readout averaged 0.66A at 5.12V. To be fair, my phone was at 90% charge at the time and I know that the phone's charging circuit will slow the charge rate once it starts getting full, but I don't know at what point it does that. I'll try it again once the phone battery is lower.On the plus side, if I remove my phone from the unit it does register that there's no current flow and stops the timer.It does come in a decent plastic case with unnecessary amounts of foam protecting it.

There are two areas which I'm not impressed. One is trying to figure out how to use it. All that is given is a small folded piece of blue text with small text and fuzzy images. Second thing i dislike is having to do multiple presses or long presses to change screens.Accuracy in the brief testing I did seems right, at least.Also what I can't figure out is why are there no male adapters for an iPhone [although by 2023 it could be obsolete for some].