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Multi-screen interface
- Chinese and English interface display: voltage, current, power, resistance, electricity, CPU temperature, capacity, temperature, timing, test group.
- Large font capacity interface: voltage, current, power, capacity, power, test group, charging direction.
- Personalized interface: personalized interface such as voltage and current.
- USB 4-wire detection interface: multiple fast charging identification, fast charging identification display, V-: ground wire, D+/D-: USB fast charging D+/D- logic voltage value, V+: power supply voltage, timing, resistance, power, capacity, current/power.
- Screen flip interface: switch to this interface, long press the button to flip the screen 180°, other interfaces cannot be flipped by long pressing.
- Voltage and current warning interface: adjust the Max/Min voltage and Max current of the tester,When the voltage and current exceeds or falls below this range, the tester will shut down to protect your equipment.
Test Micro-usb/usb a to usb c/usb c to usb c Cable
Tips: You need to test the charger before testing the cable
- 1. Check the supported voltage and current of the charger, insert the tester, connect the adjustable Load, adjust the current to the supported current of the charger, the voltage does not change The charger is of excellent quality. The quality of the charger is poor if the voltage drop exceeds 1V, and the voltage drop within 0.5V is within the normal range.
- 2. Use the tested charger to insert the corresponding cable, adjust the current to the supported current of the charger, if the voltage drop exceeds 1V, the cable quality is poor, and the voltage drop within 0.5V belongs to the normal range.
Test Charger,Support USB A Charger/USB C Charger. Test Cables, Support Micro-usb Cable/usb a to usb c Cable/usb c to usb c Cable.
Test Power Bank/Phone Capacity
- Tester Power Bank
Fully charge the power bank, insert it into the tester, clear the mAh of the tester, connect to Load to quickly discharge to obtain mAh capacity,multiply by 90%.
- Tester Phone Capacity
The phone is fully charged, plugged into the tester, cleared Wh data, connected to Load, quickly discharged, and acquired data.
Electricity: Wh/3.75V(Phone battery voltage)=Capacity value X 1000 X90%=Phone mAh capacity.(which is close to the phone battery capacity)
Tester Charger/Cable Whether to support Fast charging
Tester USB A/USB C Charger,USB A to USB C Cable, USB C to USB C Cable, Micro-usb Cable.
- Test Charger
Insert the tester into the charger, connect Load, adjust the current to 3A, if it supports fast charging, the fifth interface will display "FCP" "FAST". If it does not support fast charging, "FCP" "FAST" will not be displayed.
- Test charging cable
Use a charger that has been tested by the tester to support fast charging, plug the corresponding cable into the charger, and adjust to 3A after connecting the cable. If the fifth interface displays "FCP" and "FAST", it supports fast charging. If it does not support fast charging, "FCP" "FAST" is not displayed.
Test various cables / monitor charging status
Charge your phone safely and check data in real time
Support QC3.0 (3.8 ~ 12V) QC2.0 (5V / 9V / 12V / 20V)
Android BC1.2 (5V)
Apple 5V / 2.4A and MTK-PE (5V / 7V / 9V / 12V)
And other Qualcomm fast charge
Test various USB / Type-C chargers
Plug the tester into the charger and connect an adjustable current loader,
Perform current adjustment and test the current and voltage data of the charger.
Let the charger be connected to the current loader for a long time to check the stability of the charger
Charge test / 1 X 2
Can meet the output of two devices at the same time, support Type-C devices, intelligent charging scheme, and ensure the safety of the device
Laptop Charge Monitoring
When you power the notebook, connect a KJ-KayJI test meter to monitor the voltage, current, capacity, power,temperature and other technical parameter information in real time.
Gabriel Ramirez
Reviewed in the United States on February 20, 2025
Pretty cool device I used to find bad cables. Basically a mini kil a watt meter
Sam
Reviewed in the United States on August 19, 2024
Just using it to test charge efficiency as well as total capacity of power banks mostly. For that purpose this works well; however it will require additional USB adapter cables not included in many cases. It works well for measuring capacity as it'll plug directly into the power bank. But for measuing charging into a power bank, no so well... requires a couple of adapter cables, which should be included.Overall happy with the way it performs and can keep track of power/capacity. The menu system is a bit of a pain to navigate through, but once you get used to having to cycle through all the menus constantly, its ok.
Mark
Reviewed in the United States on March 18, 2024
At first the amp readings were far off. My 1 amp devices showed as drawing nearly 3 amps. I created a test circuit on my bench to draw 0.5 amps and this device showed 2 amps. I reset it and now all is well. To reset: single press button a few times to get to the Settings screen. Hold button down a couple of seconds to enter that screen. Once there, single click your way down to option #5 - "Default Set..." It will be the top option on the second Settings screen. Hold the button down on that and you'll get an "OK!" confirmation. To be safe I did the same on option #6 - Clear data. Maybe there were previous settings or old data from a prior customer or from the manufacturer during a test.I'm not sure what settings or data could cause the amps to be so off, but in any event, after doing that, the readings check out from my bench tests. I took my test circuit all the way down to 18mA. Using the included - and much appreciated - alligator clips, this device bounced back and forth between 0.01 and 0.02 amps. Well done for such an inexpensive and tiny little device!This is a very cool little instrument. I was surprised to see the screens showing the line graph readouts over time. Lots to explore and use with this. Well done to the manufacturer.
Lisa dergan
Reviewed in the United States on December 26, 2024
This is high tech. User friendly. Compact piece of technology at your fingertips and quality is still there. Excellent display screen for voltage ,amps, milliamps and is an excellent quality meter with accurate readings. some things can be programmed for your personal taste of how it should be set. Many different screens. How many amp hours it takes to charge your battery or how many amp hours are left on your battery. It's extremely easy answers to all your electronic questions by reading the instructions to acquire the answer you're looking for. Has different languages but I forgot exactly which ones my apologies. Excellent value for the money. I consider this a must-have item for anybody that's into electronic troubleshooting and observing electrical input, output etc.Beautiful color screen, easy to read, small font. Well laid out display screen.Amazing piece of technology that works when you wanted to with quality behind it. Thanks
Eagle Rock
Reviewed in the United States on December 12, 2024
With this tester you'll be able to ascertain the actual performance of small USB power supplies compared with the posted voltage and amperage. Had a supply burn out a camera because it had a high output of alternating current. The clip leads allow testing of non-USB connections such as small solar panel powered lights. Very nice product.
GaryO
Reviewed in the United States on March 6, 2020
I use this for testing USB-C chargers, battery packs, and cables. I love that it gives you so much information - not just V and mA like the Satechi, but watts (which is the most important metric overall!) and also total charge (mAh) and total energy (mWh), elapsed time and more. I used it to know that my Pixel 2 XL wasn't getting 9V from the USB-C charger I was using; replacing that gave me much faster charges.The UI is a bit wonky; the "W" for watts is some kind of strange character, but you get used to it. To reset the charge time, total charge, and total energy, each one is a separate reset, so to reset all you have to double-click, then triple-click, then quad-click. The "input" and "output" USB-C ports are labeled backwards, and the "manual" (even the new one) is pretty hopeless. "Resistance" is a bit weird, it's just V/I as far as I can tell, a bit meaningless for this application. (It won't measure your resistors.) And I wish it had a display mode that showed watts in larger font. But on the good side, it's accurate, the display is clear, it has all the info you could want, I like that you can flip it upside down, and also it remembers your settings between uses which is great. And the multiple inputs & outputs are super useful. You can test pretty much anything USB-related with it. Although, it says it can test batteries: not really so much. It comes with alligator-clip cables which you can hook to a voltage source of 3V or more (i.e. not a AA or AAA battery) and it'll measure voltage, but not under load which is what a battery tester needs to do. That's not why I bought it though so I'm good with that. On the other hand, if you have a USB AA/AAA battery charger, you can hook this tester into that and measure the total charge sent to the batteries you're charging.
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