I was led to this searching for ways to force USB-C PD to flow only in one direction (force one dual role device as sink and the other dual role as source). Well, this does not do, despite one out being labeled explicitly as input and the other as output. It would allow the negotiation to perform a dual role swap in reverse.
It tells you the basics you may want to know - instant voltage, current and power readings, as well energy (power integrated over time). I am not quite sure if it is in mWh or in mAh, but with variable voltage the former should be the sensible unit.
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DROK USB Tester, USB-A 2.0 Digital Multimeter Dual USB Output Ports PD QC 3.0 Color LED Display, 7 Modes Capacity Voltage Current Power Voltmeter Ammeter for Laptop Power Bank Phone Solar Panel
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From the manufacturer
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| USB Load Tester | USB Load Tester with Display | USB Buck Boost Voltage Converter | USB Voltage Regulator | |
| Input Voltage | DC 4-25.0V | DC 4.0-25.0V | DC 3.5-15V | DC 3.5-15V |
| Operating Current | 0.25-4.00A | 0.03-5.00A | ||
| Max Discharging Power | 25W | 35W | ||
| Output Voltage | - | - | DC 0.6-30V | DC 0.6-30V |
| Display | LED | LCD | LCD | LCD |
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Should You Buy? UGREEN USB C to Lightning Cable
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I had purchased this USB C input version but had never reviewed It until now. It was used about 5 times to verify the charging capability of "fast charge" power bricks and to verify cables. It worked great using both usb A and C output ports. However, now while attempting to review it the usb A outport port went dead. It is not working. 3 different cables verified it was not a faulty cable. The 3 star rating indicates that when it worked it was great little devise. Since the usb C outport was still working I went thru the various cycles to confirm the operation. I really liked this devise when it was working because :A) It's very basic and simple to use. Plug the usb C pigtail (Input) into a power brick The other cable into either usb A or C output on the devise to your phone and you immediately get voltage and current readings. That's what most people will use this basic tester for. You can press the top button again and it will give you a capacity display indicating how much current has flowed and the the time. If you completely discharge your phone and charge it in this mode it will tell you the actual capacity of your battery to accept charge. Push the button again and it will alternate between the 2 displays.B) In either case if your devise has a different connector type you can always buy an adapter.C) This devise has a short "pigtail" cable to plug into the tested unit. Many others do not. They plug directly into the tested devise. They are fixed in place, can be more easily broken and may be hard to read in this position, especially if the display happens to be upside down.So, Im sorry to see this devise partially fail. I liked it. It's past the 30 day return time but at this price point I may buy another one or opt for a more advanced version with more test capability.
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Top reviews from the United States
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Reviewed in the United States 🇺🇸 on January 8, 2023
Color: BlueSize: USB-A&USB-C ProVerified Purchase
Reviewed in the United States 🇺🇸 on February 13, 2023
Color: BlueSize: USB-A&USB-C ProVerified Purchase
Top reviews from other countries
Ricky Silvan
It's already saved $$$ being scammed by a local service company.
Reviewed in Canada 🇨🇦 on January 12, 2023Color: BlackSize: USB-AVerified Purchase
Ricky Silvan
Reviewed in Canada 🇨🇦 on January 12, 2023
Clearly one of the reasons why the iPad did not charge, was that the defective charging cord only works depending on which side it's plugged in.
It could have also prove that the part that the technician installed, was likely not installed properly, still not working, and at great cost me for the charging port.
If not only proved that the guy was lying to me and charged me over $214CN dollars to fix a $99 item that Apple would have fixed.
Now, they did something to make my screen inoperable and was trying to hold me ransom to spending more money to replace both the screen and install a new battery. I know if I take it to Apple, the repairs wouldn't be this exorbitant nor would I be ripped off!
The fact that the battery has since charged, and held its charge, there is clearly no need to recommending it to be replaced. I wish I had this product before I even took it to the service technician.
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Dave
Nice little tool.
Reviewed in Canada 🇨🇦 on November 1, 2021Color: BlackSize: USB-AVerified Purchase
J-Tec
A very useful device
Reviewed in Canada 🇨🇦 on December 28, 2021Color: BlackSize: USB-AVerified Purchase
Thomas D.
Excellent USB Multimeter
Reviewed in Canada 🇨🇦 on October 11, 2021Color: BlackSize: USB-AVerified Purchase
Hart
A must have item if you want to know what's happening with your phone battery
Reviewed in Canada 🇨🇦 on September 11, 2015Color: BlackSize: USB-AVerified Purchase
Hart
Reviewed in Canada 🇨🇦 on September 11, 2015
While the monitors read out is rather small it’s still bright enough to read even in a well-lit room. What it shows you provides all of the details you need to keep an eye on your batteries and chargers. By showing charger Voltage, Current, Charging Wattage, and Calculated Battery Capacity you can:
~Determine if your charger is putting out enough current, see if it matches what its rated at
~See if the voltage drops when the charger is putting out high current (Amps) which is a bad thing
~View the power being consumed, Watts while charging or just running a device off of the charger
~Battery capacity, you’ll need to start with a dead battery in order for this to be relatively accurate
This last item is a must if you need to determine if your battery is taking a full charge. As an example, if a battery is rated at 3000Mah and the monitor shows its only taken 2100Mah worth of current but shows full, then the battery is no longer able to be fully charged and probably why your battery hungry phone won’t last all day on a single charge.
There is one more element in battery charging that’s very important, battery temperature. Unfortunately, this device has no possible way of monitoring internal battery temperatures and you’ll need to rely on the charge circuitry built into the phone itself to ensure there are no overheating issues.
While monitoring the four functions above it still passes data and I found that it did not slow down the transfer speeds including USB 3.
There will be times when you plug it in and the display will read upside down, a button located on the bottom when depressed momentarily will reboot the device and flip the display around.
Using this is as easy as plugging a USB cord into a charger and then the device. Simply plug the display into the USB port first and then plug the cable into the other end of the display. Now connect your phone or other device and that’s it.
I’ve tested it on several chargers and devices and found it to be accurate when compared to bench meters.
If I were able to make a suggestion to the manufacturer it would be to increase the size of the display.
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