12 best voltage tester for usbs

• UPGRADED MULTIFUNCTIONAL USB C POWER METER: Detects the charging status and process of your USB-enabled or type c-enabled devices. Supports QC3.0, QC2.0 and BC1.2. A Must Gadget checks the charging performance (charging speed and quality) of the output wall/car/solar panel chargers and USB charging cables. It can be also used to find the highest current of the Wireless Charger, and test capacity and electric energy of power bank.
• PROFESSIONAL SAFETY GUARD: Featured with over-voltage protection, over-current protection, under-voltage protection, low energy protection and alarm system. This upgraded USB Type C tester can detect safety and maximally protect the appliances from damaging. It will cut off output automatically and alarm by sound, while it will save data when power off suddenly.
• MULTIPLE COLOR SCREEN DISPLAY MODES: New upgraded version offers 8 LCD main color screen display interfaces, allowing switching the display interface by pressing the key. With the new interface settings, this instrument can monitor voltage, current, capacity, electric quantity, power, load impedance, D+/D- voltage and other data of USB.
• WIDE RANGE OF APPLICATION: Thanks to the PD protocol quick charging mode measurement technology, this new multimeter supports the updated iPhone X mobile phone. (Support iphone 8 / 8P / iPhone Xs quick charging, 29W power, 5V3A / 9V3A / 12V2.5A / 15V2A). It also can be applied to test other type C devices, Compatible With Galaxy S10/S9/Note 10 +, ChromeBookPixel, OnePlus and More.
• EVERSAME PROMISE: We have always believed that a stable and continuously improve product quality. We trust our products and we offer worry-free 18-month. For any reason you are unsatisfied with our product, just feel free to contact support for exchange or refund. WHAT WE PROVIDE: 1X USB Tester. (Note: If the USB Tester doesn’t display any parameters, please insert the small adapter being sent with the package into the side hole on the USB Tester, to trigger the PD Charging Function. )

User questions & answers

Question:	I am confused about usb2 usb3 and c type chargers. will this help organize my chargers and get rid of the old ones that only do slow charging
Answer:	Yes. Actually USB3 has 2 types, slow charge and fast charge. The fast charge is higher voltage. As for USB Type C, it has it all. It is fast charge, will run your monitors, backward compatible with the other USB ports, you can even connect your network cable to it. You buy a hub and it can do them all together.
Question:	What does OFF mean in the bottom right corner of the screen
Answer:	That is the display for the charge timer. The J7-c can be set to stop charging after a certain time, from 1 to 24 hours. By default, the timer is off and shows on screens two and three as OFF. To set the timer, do five quick presses of the KEY button while on-screen three. OFF will start flashing on the bottom of the screen. Continue pressing the KEY button until you reach the desired setting (AO is auto-off). After charging for the set time, the J7-t will stop charging, beep a few times, and display OFF on its screen. Pressing the KEY button brings the normal display back up.
Question:	Can i plug the usb-c input into my computer and plug the power into the usb-c output and power the computer and get a reading
Answer:	Yes, you can plug the usb-c input into your computer with the usb c connector, and plug the power into the usb-c output, to power the computer and get a reading. Meanwhile we will offer 18-month Breakage Warranty for the tester. If anything we can help you in the future, please feel free to contact us by Amazon email or message, and our customer service will try the best to offer the good solution to compensate you accordingly.
Question:	Will this tester help me organize my chargers and get rid of the old ones that only do slow charging- for type c and usb
Answer:	Sorry about the first two guys who misunderstood your question...sometimes people are so eager to help that they don't even really read the question. Anyway, yes it will help you "organize" your chargers. But...you have to make sure the chargers are tested under the exact same parameters. The charging voltage and amperage will vary by the type of device being charged, it's state of charge, how long the charger has been connected, and even the temperature. You plug this dohicky between the charger and the device you are charging (such as a phone). Make sure the phone has the exact same charge level for each test, the environmental temp is about the same +/- 15 degrees if indoors, within 5 degrees on a really hot day outdoors. What 30sec to a minute for the charge rate to stabilize, Then you can compare the charge rates of each charger to try to decide if it's a high or low-speed charger. Good luck.

Product features

Multi-Interface USB-C Tester

More Display Modes

Crafted from high-grade LCD monitor, bright and clear enough to monitor the parameters on the screen monitor.

Become A Safety Guard of Your Devices

Detect Charging & Discharging Condition Of Your Devices

Test Charging Speed & Quality of USB Cable

Under the circumstance of the constant power supply and sustained load, the larger voltage and the lower voltage drop of the USB cable detected by this USB Tester means that the better quality of the USB Cables will be.

Test Capacity and Electric Energy of Power Bank

Make sure the power bank to be tested is fully charged firstly, then plug this USB Tester into it and reset the capacity and electric energy by long pressing, and connect your phone or load or other discharging devices, making it charge for phone and or other discharging devices till power bank run out of its energy. Finally, the reading on this multimeter is real data of capacity of your power bank.

Test Charger

A Must Gadget for Testing or Repairing Your Phones & Chargers

- Check the charging performance (charging speed and quality) of the output wall/car/solar panel chargers and USB charging cables, and test capacity and electric energy of power bank

- It can be also used to find the highest current output of the Wireless Charger/ Wireless Charging Stand/Wireless Charging Pad.

Note: If the USB Tester doesn’t display any parameters, please insert the small adapter being sent with the package into the side hole on the USB Tester, to trigger the PD Charging Function.

Product description

The Klein Tools ET920 is a USB digital meter for Type-A and Type-C ports. It accurately and reliably measures and displays the USB port voltage, current, capacity, energy, and resistance simultaneously. It can function with any USB-A and most USB-C ports, including Qualcomm Quick Charge ports that have the ability to deliver power. It requires NO batteries as it draws power from the power source to function. USB Power Meter for any USB-A and most USB-C Ports. Monitors Voltage, Current, Capacity, Energy and Resistance. Powered by the USB port; no batteries required. Hi-resolution LCD for clear visibility in environments with low ambient lighting. Durable cables to allow easy access to hard-to-reach ports. Rugged, pocket-sized, and light weight Klein industrial design stands up to jobsite demands. Built to withstand a 6.6-Foot (2m) drop. No batteries needed; powered by the USB port being tested. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857.

• 3 to 20V DC; Current: 0.05 to 3A (USB-A); 3 to 20V DC; Current: 0.05 to 5A (USB-C)
• Continuously monitor up to 1000 hours of voltage, current, capacity/charge delivered, energy, and resistance (calculated)
• Tests most common standard USB-A or USB-C ports, including Qualcomm Quick Charge ports
• Store and recall up to 10 readings
• Voltage and current overload detection

User questions & answers

Question:	Are you able to run the load test continuously? it just stops after a few seconds and says pass/fail. i’d like to run it until failure of dut
Answer:	No, the internal load will not run continuously. An external load could be applied and measured up to 1000 hours as the description states.
Question:	Does this device support Qualcomm quick charge 3.0 specifically
Answer:	I would think so, it supports other generic and name brand chargers
Question:	Will the 910 model also pass through data
Answer:	I have the 900 model. I use mine for troubleshooting power issues on USB ports, and I had never thought to connect it to a date source. I plugged it into my MacBook and connected a USB thumb drive. I can read the drive through the Model 900. So next I connected a SeaGate portable hard drive. I can read that drive and monitor ithe port voltage and current. I haven't done anything to test the effect on read/write speeds, but it does pass through data.
Question:	My et920 usb tester shows no voltage on the usb-c ports for leviton combo usb/120v outlet devices. it never lights up. is this normal
Answer:	Update more info: the only usb-c cables I have found which will cause the LED to light-up on the Et920 without an actual device being plugged in, are the Apple usb-c to Lightning cables. I suspect this is b/c of circuitry apple has built into these cables. And even though these cables can "fast charge" certain apple devices at >5v, without a device plugged in, the Et920 always reports ~5V power and 0A with just the Apple cable plugged in.

Product features

USB Power Meter, USB-A and USB-C Digital Meter for Voltage, Current, Capacity, Energy and Resistance

The Klein Tools ET920 is a USB digital meter for Type-A and Type-C ports. It accurately and reliably measures and displays the USB port voltage, current, capacity, energy, and resistance simultaneously. It can function with any USB-A and most USB-C ports, including Qualcomm Quick Charge ports that have the ability to deliver power.

Product description

Description

FNB48 Multifunctional fast charging protocol detector

1. Integrated USB-A, Micro-USB, Type-C interface, with 1.77-inch high-definition display, using external 16-bit ADC, PD protocol physical chip, real-time monitoring of voltage, current, power, power, capacity, charging protocol during charging, Curve aveform, etc.

2. No need to match the original data cable, you can also directly detect the charger protocol of OPPO, Huawei, OnePlus and other brands.

3. In any interface, by long pressing the return button, the screen can be hibernated, wake up by any operation, and charging at night will not affect sleep.

4. FNB48 uses the differential pressure method to measure the internal resistance of the cable, Use with constant current load, Easily detect the internal resistance of the cable.

Features

Voltage and current curve,real-time detection of voltage and current

Low-speed voltage and current curve

Low speed D+D-curve

Record offline curve

High-speed voltage ripple(AC coupling)

Powerful & Stable performance

Protocol detection Protocol trigger Wave curve

Line resistance measurement Ultra low internal resistance

Driver-free upper computer upgrade

Parameter

USB3.0 high-speed transmission

Monitor voltage: 4~24V

Monitor current: 0~6.5A

Monitor power: 0~156W

Protocol detection

A PPLE 2.4A, QC2.0, QC3.0, PD, Sam-sung AFC, Hua wei FCP, Hua wei SCP, VOOC/WARP, Su perVOOC, MTK-PE

Protocol trigger

QC2.0, QC3.0, Hua wei FCP, Hua wei SCP, Sam sung AFC, PD trigger, VOOC/WARP, SVOOC

• HIGH PRECISION DISPLAY: 5-digit/6-digit display with one-key switching, max resolution 0.00001, real-time monitoring of subtle changes involtage, current and power during charging. It can also detect the weak current when the original Apple data cable is no-load.
• FASTER TRANSMISSION RATE WITH USB 3.0: FNB48 uses USB3.0 interface, 9-pin pin design, compatible with USB2.0, transmission rate is 10 times that of USB2.0, and more energy-saving.
• RECORD MORE DATA: FNB48 can record up to 10 sets of measurement data. It could directly put the calculation formula of battery capacity on the tester, The calculation result is multiplied by 1000 to get the capacity of the battery, and the calculation is more convenient and faster.
• PD E-MARKER, DASH CABLE INSPECTION: FNB48 supports reading the data of E-Marker and DASH cables. After connecting the data cable, it is easy to read the chips of E-Marker and DASH cables. With analog DASH cable and Apple 2.4A acceleration function, it can directly charge and detect voltage and current without the original data cable.
• GRAVITY SENSING SCREEN AUTOMATICALLY FLIPS: The screen OF FNB48 can be flipped freely trough gravity sensing. You can also turn offthe gravity direction recognition, Long press the middle button to realize the screen flip.

User questions & answers

Question:	How do i change the language to english? when i powered it up and pushed the button it didnt go to the menu
Answer:	Long press the button, the language will be displayed after power on. Then to keep pressing and waiting until you turn to English. Thank you.
Question:	Is this meter usb pd 3.0 compatible? it just says pd in the specs with no version listed except for quickcharge
Answer:	Hi, yes, it can support usb pd 3.0. Thank you.
Question:	is ther an ios app for this device
Answer:	I don’t think so.
Question:	What is the difference between the versions: yellow, blue and black
Answer:	The main differences are: -Which types of connectors they have available: USB type A male and Female, mini-USB male and/or Female, USB-C male and/or Female - Unidirectional or Bidirectional voltage/current measurement. - Amount of electrical variables they are able to measure in real time - Direct reading on the device or Bluetooth connection. I recommend to define what type of devices do you want to connect to the device and what type of tests do you want to do, and then select the right device.

• 【Latest Upgraded USB C Power Meter Tester】:Maximum voltage Current 32V/5.1A/150W,The multimeter tester can monitor Voltage,Current,Capacity,Electric Quantity,Power,Temperature,Resistance,Charging Time and other data of the USB or type C Port Devices.A Must Gadget checks the charging performance(charging speed and quality) of the output wall/car/solar panel chargers and USB charging cables.It can be also used test capacity and electric energy of power bank.
• 【Latest Upgraded IPS Color Display Screen】: New upgraded version offers 8 IPS main color screen display interfaces,allowing switching the display interface by pressing the key.With the new interface settings,this instrument can monitor voltage,current,capacity,electric quantity,power,load impedance,D/D- voltage and other data of USB.Click the button to switch in multiple interfaces.(Supports flipping the screen to 180 degree, and 3 kinds of personalized interfaces!)
• 【Test Power Bank Capacity】Before testing the power Bank,please fully charge the power bank,insert the tester and double-click to clear the data,then connect the load or mobile phone (continuous discharge is required).ensure that the discharge voltage is 5V or 9V.(mAh is multiplied by 1.35 when discharge voltage 5V, and mAh is multiplied by 2.45 when discharge voltage is 9V, which is equal to the exact capacity of the battery of the power bank.)
• 【WIDE RANGE OF APPLICATION】: The USB tester comes with A OTG adapter, supports PD3.0/PD2.0, QC3.0/QC2.0,BC1.2 and USB A or USB C port,supports the updated iPhone 11 Pro mobile phone.(Support iphone 11/X/iPhone Xs quick charging, 29W power, 5V3A / 9V3A / 12V2.5A / 15V2A).Compatible with new MacBook Pro, MacBook, iMac, iMac Pro, Dell XPS, Acer Aspire, HP Spectre, ASUE Zenbook , Lenovo Thinkpad, Eluktronics, Razer Blade Stealth, Chromebook, Microsoft Surface Pro and more Type C devices and chargers
• 【Important Tips and 18 Month Warranty Service]】:When your device does not have a USB port, you can use an alligator clip to clamp the positive and negative poles and convert to USB before testing. When your USB-C device cannot be tested, please insert a small adapter, the small adapter will start the tester. If you receive a defective USB tester or if you have any questions, please contact us first to obtain a valid warranty replacement service for replacement or other assistance.

Product features

Reasons for Beeping Alarm

• Over Load Voltage Protection Function: The Threshold Voltage Default Parameter is 35.0V. To adjust the Overload Voltage(1.00-35.0V Range Setting),please switch to the volatage > 35.0interface;double press on the button to increase 1v while 3 click on button to decrease 1V.If the detected voltage is higher than the setting voltage,the test will make a beeping alarm sounds.
• Low Voltage Protection Function:Switch to the voltage < 0.00V interface,the default voltage threshold is 0.00V.To adjust the low voltage(0.00V-34V Range Setting),double click on the button to increase 1v while 3 clicks on button to desrease 1V(Long press the key will continually reduce or add the data to the voltage).If the detected voltage is lower than the setting voltage,the test will make a beeping alarm sounds.
• Overcurrent Protection Function: Switch to the voltage>10.0A interface,the default current threshold is 10.0A.To adjust the current(0.20A-15.0A Range Setting),double click on the button to increase 1A while 3 clicks on button to decrease 1A(Long press the key will continually reduce or add the data to the current).If the detected current is lower or higher than the setting current,it will make a beeping alarm sounds.

Partial charging protocol voltage logic table

Q:The tester said the 96w MacBook Pro charger is providing 32W of power.

A:Excellent chargers have smart chips inside, it will adjust the voltage, current and wattage according to the device, avoid charging overload and other phenomena, and better protect your device. When the power of the device exceeds 70%, the charger will start to reduce the voltage, charge slowly and reduce the wattage.So the 96w charger will display 32W power

Test power bank and usage of crocodile clip

If you are using to test the Power Bank, please fully charge the Power Bank, insert the tester and double-click to clear the data the tester, and connect the load or mobile phone (the mobile phone needs continuous use, you can play music or watch videos). Power Bank After the power is exhausted, connect the tester to the charger, and there is no output.

So far, the capacity MAH value shown above is multiplied by the ratio of the lithium battery output voltage to the power bank.

(mAh is multiplied by 1.35 when output is 5V, and mAh is multiplied by 2.45 when output is 9V, which is equal to the exact capacity of the battery of the power bank.)

If your device does not have a USB port, but has positive and negative terminals, you can use a USB double-ended alligator clip cable. By connecting the positive and negative terminals, the crocodile clip can convert a device without a USB port to a device with a USB port. Connect it to a tester for testing.

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.

• 【MULTIFUNCTIONAL TOOL】: Support quick charger recognition; data wire resistance value testing; QC2.0/QC3.0, Voltage/Current/Power Detection; data store; cable impedance measurement. Automatically recognize QC multiple protocols such as PD QC2.0 QC3.0/4.0 MTK. Allows you to check the charging performance of the output wall/car/solar panel chargers and USB charging cables. It can be also used to find the highest current of the Wireless Charger, and test capacity and electric energy of power bank.
• 【WIDE RANGE APPILCATION】: Widely used in the quality inspection of digital devices with Micro USB and Type C peripheral. Great for testing and getting real draw ratings on various chargers and equipment, such as PC/Laptop/Desktop Computer/Mobile Phone/Power Bank/Charger/Discharge Load/Car Charger/Cable. With this tester, you can see clearly what was happening when charging various USB devices, ranging from iPhones, to Tablets and batteries.
• 【BRIGHT COLOR DISPLAY INTERFACE】: 1. Measurement Main Interface 2. Quick Charge Identification Interface 3. Data Recording Interface 4. Wire Group Impedance Measurement Interface 5. Voltage Graphing Interface 6.Current Graphing Interface 7. Settings Interface. Voltage measuring range 4.5-24V; current measuring range 0-3A.
• 【UNBEATABLE DESIGN】: 1.44'' LCD display with screen display rotating function design; 4 operating buttons and 5 connected ports. Plug robust coating with the gold-plated USB contacts can resist scratch, stain and damage. (Note: If the screen doesn't function or turn on/off frequently while it's connected to the power supply, please flip the connector of the USB C Cable to confirm if it can work correctly. For energy-saving, the lights on the screen will go off after 30s.)
• 【ADDITIONAL BONUS】: Come with an ultra-durable nylon-braided USB Type C to USB Type C Cable(50cm), allows you to detect your USB Type-C enabled devices (Chromebook Pixel, Galaxy S10, Note 10/9etc.) more conveniently. 【Package Including】1 * USB tester (no Bluetooth) + 1*USB C to USB C Cable(50cm)(USB Load Tester is Not included.)【EVERSAME PROMISE】: We trust our products and we offer worry-free 24-month in case of defective product and friendly customer service.

User questions & answers

Question:	Max wattage
Answer:	The maximum maximum should be about 72 wattage. Any other question please feel free to contact us via Amazon email or message.
Question:	Will this model detect and support BC
Answer:	Note that detecting BC1.2 is the same as detecting DCP/CDP/SDP, but I don't see either listed.
Question:	Will this device detect and display quick charging of a 10.5” apple ipad pro (the 15v quick charge
Answer:	Hi, thise tester will recognize and detect the PD protocol and Qualcomm QC3.0/4.0 protocol, and support Quick Charger 2.0/QC3.0 detection. So this tester should detect the 10.5” apple ipad pro (the 15v quick charge). And please kindly note that, the USB C TO USB C Cable being sent with the package won't work with the ipad pro. So please prepare two of the original cables to detect your device accordingly. If you find that this test doesn't work with any of your devices, please feel free to contact us by Amazon message or email, and our customer service will try the best to fix the matter for you. We are glad to do business with you soon.
Question:	Description says “ the type c data cable impendence measurement...of different usb c cables”. so, only works for usb-c
Answer:	It will work with USB 1.1, 2.0, 3.0 with the following plug/jack types, type A, type B micro, type C. You can use the device to detect the impedance / resistance of various charging cables to determine good quality from bad. All in all works as advertised.

Product features

Bright Color Display Interface

Crafted from high-grade LCD monitor, bright and clear enough to monitor the parameters on the screen monitor.

Unbeatable Structure

Equipped with 4 operating buttons and 5 connected ports, as well as the robust coating with the gold-plated USB connectors can resist scratch, stain and damage.

Pocket USB Voltmeter

Compact Design with handy storage case enables you to put it in your bag or your pocket for your distant trips or outdoor activities.

Notebook Charging Measurement

As shown in the figure, Use two of the USB C To USB C Cables for testing when the computer is powered, and the Measuring Data will be tested and detected by the multimeter accordingly. Support to test the Notebook with high-power, monitor the condition of battery aging, and evaluate the Quick Charging Situation of Notebook.

More Safe and Reliable – Monitor the Voltage and Current of Charging Phones In Real Time

While the cellphone is being recharged, the parameter of the voltage and current will be detected and read by the tester in real time.

Type C Data Cable Impendence Measurement

You can check the quality and charging speed of different USB C Cables, via detecting the voltage drop and Current of the cables by this multimeter.

• The AT34 uses a 0.96-inch IPS high-definition color LCD display to display the state of charge of the appliance, voltage, current, capacity, energy, power, equivalent impedance, temperature and other indicators at a glance. 160 degree wide viewing angle, high brightness and long working life. Fast charge recognition, widely compatible: AT24 supports QC2.0, QC3.0, i Phone 2.4A/2.1A/1A/0.5A, Andriod DCP, fast charge protocol identification, let you know the state of charge of the phone.
• Power-off storage, data is guaranteed: AT34 has power-off storage function, which can store capacity and energy data when the mobile power is cut off, which is convenient for subsequent viewing and convenient for capacity energy measurement of mobile power.Note: Other USB testers that do not have a power-down storage function cannot test capacity and energy.
• 4-bit accuracy for more accurate measurements; Measure the load equivalent impedance and power; Thermometer function, Celsius and Fahrenheit free switching: Using high-precision thermistor sensor; USB 3.0 interface: Compatible with USB 2.0, support high current test, support USB3.0 interface mobile hard disk and U disk test.
• Measure the quality of the charger: connect the same load, compare the no-load and the load, the greater the voltage drop, the worse the charger capacity is, the worse the quality; the voltage drop is not obvious or the voltage rises (leisure loss) Compensation function) The better the load capacity of this charger, the better the quality.

User questions & answers

Question:	What’s the difference between at34 and at
Answer:	At34 = 4 digits total (ex : 05.01v) AT35 = 5 digits total (ex : 05.011v) There’s no real guarantee the last digits are remotely accurate. So get what’s cheap. Use it. When it burns out (like all cheap electronics) get another one. Done
Question:	Will this support usb 3.0 and/or usb 3.1 data transfers while measuring
Answer:	I'm not sure about 3.1--I can't find either version referenced in the manual. I haven't tested it extensively, but it does have a pass-through and three other, smaller ports. It seems to work with my 3.0 ports. One thing, though--the only way to get an English manual is to scan the QR code that comes with it and navigate to the proper downloads. There's also software, but I haven't installed it yet. The whole thing comes in a tin the size of an Altoids box.
Question:	What is the current consumption of the meter itself
Answer:	The usb meter uses about 16mA and 7mA with display off.
Question:	I want to measure Usb c port. I hace to connect usb c in or usb male port
Answer:	The device has a separate USB-C Input and USB-C Output port, so it is easy to connect it "in-line" to check on USB-C performance. You need 2 cables: One can be your normal charging cable. The other would have to be a cable with 2 USB-C connectors.

Product features

Measure The Quality Of The Charger

• Connect the same load, compare with no-load and on-load, if the voltage drops more, it shows that the worse the charging capacity of the charger is, the worse the quality is.
• When the voltage drop smaller or voltage is increasing (charger has cable loss compensation function ), it shows that the better the charger's load capacity, the better the quality!

Quick Charge ldentification

• AT34 supports the identification of QC2.0, QC3.0, apple2.4a/ 2.2a/ 1.1a /0.5a, Android DCP, and Samsung quick charging protocols, let you know your phone charging status.

Power off storage-Data stored

• AT34 has the function of power off storage, When the power bank is power off, the capacity and energy data can be stored, which is convenient for subsequent inspection, and convenient for capacity and energy measurement of the power bank!

4 Bits Measurement Accuracy

• At AT34 internal, adopt the professional instrument to sample circuit and use the Ruideng unique precision algorithm, which ensures the accuracy and stability of the product at the hardware and software level!

High Definition Display

• The AT34 adopts a 0.96 inch IPS HD color LCD display with a 160-degree wide view, high brightness and long service life. Let you see from any angle to appreciate the color bright, exquisite and natural display picture.

Measure Load Equivalent Impedance And Power

• Clearly understand the load impedance and current discharge power, better understand the load usage range, usage will be more convenient and faster.

• Multi Functional Tester: Multiple interfaces (USB input/output, Type-C input/output and Micro USB input),Used to detects the charging status and process of your USB-enabled or type c-enabled devices.Data transfer supported but have limitations,please refer to product description for using details .Supports QC3.0, QC2.0 and BC1.2 ,MTK in different devices. It can be also used to find the highest current of the Wireless Charger, and test capacity and electric energy of power bank.
• Safety Protection: Featured with Over-voltage protection, Over-current protection, under-voltage protection, low energy protection and alarm system. So, this USB Type C tester can detect safety and maximally protect the appliances from damaging. It will cut off output automatically and alarm by sound, while it will save data when power off suddenly.
• LCD MULTI-COLOR Display : Upgraded version offers IPS HD 9 LCD main color screen display interfaces, allowing switching the display interface by pressing the key. Support English or Chinese Language show, and individual screen display for more visible enjoyment.
• Support PD protocol：Thanks to the PD protocol quick charging mode measurement technology, this new multimeter supports the updated iPhone X mobile phone. (Support iphone 8 / 8P / iPhone Xs quick charging ONLY with IOS PD Fast charging adapter and cable). It also can be applied to test other type C devices, such as Samsung Galaxy S9 Plus, Google Chrome BookPixel, OnePlus, HuaWei P9, ect.
• OTG Adapter for Free : It comes with a OTG adapter,which enables you to expand your USB and Micro USB Function.(convert USB input connection port to Micro port by Insert OTG Adapter).We are always at your disposal for solving problems for you,buy with confidence.

User questions & answers

Question:	will it test the apple cable
Answer:	This multifunctional tester can support type a ,type c ,micro usb connection ports while apply cable is of lightning ports,so if you can convert it to any ports among type a ,type c ,micro usb,it will help you to test .
Question:	What is the function of the OTG adapter
Answer:	Connect the OTG adapter to the USB input port in case your power supply has a Micro USB output port.
Question:	Is there any way to turn off the beep
Answer:	Seems like you'd have to crack it open and remove or disable the beeper. Not too hard. Pretty straightforward
Question:	Question for manufacturer. instructions use english words written by someone who does not speak english. please put understandable instructions here
Answer:	Good luck with that! Products designed in Asia have this problem to some degree 90% of the time.
Question:	Can it help me see how much charge a powerbank has
Answer:	Yes. I have done this with my power bank. After fully charging the power bank, put this meter between the power bank and the device you want to charge. Press and hold the reset button to zero the mAh reading. Charge your device. Continue charging additional devices without resetting the mAh reading. When the power bank is drained, check the mAh reading. The mAh reading will hold its value between device charges even if unplugged from the power bank.
Question:	Can i use it to figure out how much power is in a power bank
Answer:	Yes. I have done this with my power bank. After fully charging the power bank, put this meter between the power bank and the device you want to charge. Press and hold the reset button to zero the mAh reading. Charge your device. Continue charging additional devices without resetting the mAh reading. When the power bank is drained, check the mAh reading. The mAh reading will hold its value between device charges even if unplugged from the power bank.

Product features

Multi Screens Display

Display Screen Operation Manual:

• Short press the screen to switch screen display;
• Long press the screen to flip ;
• Fast double-click capacity mAH clear;
• Fast three-stroke current WH clear;
• Fast four-stroke time clear;
• Fast five-stroke setting full power-off reminder switch and timed charging duration power-off reminder setting flashing In the flashing setting, double-clicking is the add-on click is the subtraction, and when adding and subtracting, press and hold for the continuous addend and subtraction; when the short button is pressed to the over-voltage low-voltage over-current setting interface, by quick double-click or fast Three hits are to adjust the value.

Please Kindly Note:

When the ambient temperature changes or the outside heat conduction to tester causes the current to not return to zero and the display shows 0.01A or 0.02A or otherwise,Please Hold on the key button then insert to USB Charger It can make the current temperature of the ambient current zero calibration,After the zero can more accurate measurements.And when in Zero calibration,the output can not have any load current consumption, so usb tester display 0.00A.

Wide Compatibility

USB Port Input

1. When the USB input port is not connected with any other adapter, the USB output port can read data and charge, the type c output port can only support charge (USB output port and type c output port can simultaneously charge)
2. Connect the OTG adapter to the USB input port (this product is equipped with an Android adapter) or type c to USB adapter. Both the type c and USB output port can read data (cannot read data at the same time) and charge (can be simultaneously Charging, showing the total output)

TYPE C Port Input

1. When the TYPEC input port is not connected with any adapter, the TYPE C output port can read data and charge, the USB output port can only be charged (USB output port and type c output port can simultaneously charging )
2. Connect other USB to TYPE C adapter or Mirco to TYPE C adapter into TYPEC input port.,Type c output port and USB output port can read data (cannot read data at the same time) and charge (can be charged at the same time, showing the total output)

Mirco Port Input

• It is only used for testing data such as current and voltage of Android phones (Mirco input, USB output)

Test Charging Speed & Quality of USB Cable

Under the circumstance of the constant power supply and sustained load, the larger voltage and the lower voltage drop of the USB cable detected by this USB Tester means that the better quality of the USB Cables will be.

OTG Function Support

It comes with a OTG adapter,which enables you to expand your USB and Micro USB Function.(convert USB input connection port to Micro port by Insert OTG Adapter).

Multi-Interface USB-C Tester

Crafted from high-grade LCD monitor, bright and clear enough to monitor the parameters on the screen monitor.

Wide Range of Application

It can be applied to test Type-C , USB A and Micro USB Devices. It can be also used to find the highest current of the Wireless Charger, and test capacity and electric energy of power bank.

Product description

Parameters:

Measuring range: 4-30 (V)

Input voltage: 4-30 (V)

Usb smart detector: current, voltage, capacity, power, temperature, time, type-c interface

Current: 0-5.1A

Voltage: 4-30 V

Timing: 0-99 hours

Power: 0-65 W

MAC: 0-99999 mAh

Internal temperature: 0-80 degrees



Descriptions:

High-quality raw materials: 1. Safety plug, suitable for any electronic device with USB-C, Type-C, suitable for a variety of environments (aluminum alloy joints, precision built to effectively avoid oxidation and rust); 2. Robust interface , sensitive touch, aluminum alloy material, (built-in aluminum alloy plate, anti-friction and anti-rust for repeated use). 3. Clear screen, using USB monitor, the state of charging is clear at a glance, the number is clearly visible; 4. Type-C interface, time timing, no explosion, to prevent accidents;

Button function: Click the button to view the charging data saved in groups 1-9; press and hold the button for 3 seconds to clear the charging data saved in a single group; double-click the button to rotate the display content for convenient viewing;

Connection method: USB-Type-C power adapter - USB-Type-C tester - load or digital device;

Core monitoring items: {current, voltage, capacity, power, temperature, timing}. Detect the USB you use in real time to avoid accidents.



Note:

Do not exceed the voltage and current range when using!



Package Including

1 * Type-C USB Tester

• Have you used an electronic device with USB? Have you detected them in real time? Are they really safe? Our USB tester can help you solve this problem, simple and fast!
• Core monitoring items: {current, voltage, capacity, power, temperature, timing}. Detect the USB you use in real time to avoid accidents. 4. Type-C interface, time timing, no explosion, to prevent accidents;
• High-quality raw materials: 1. Safety plug, suitable for any electronic device with USB-C, Type-C, suitable for a variety of environments (aluminum alloy joints, precision built to effectively avoid oxidation and rust); 2. Robust interface , sensitive touch, aluminum alloy material, (built-in aluminum alloy plate, anti-friction and anti-rust for repeated use). 3. Clear screen, using USB monitor, the state of charging is clear at a glance, the number is clearly visible;
• Button function: Click the button to view the charging data saved in groups 1-9; press and hold the button for 3 seconds to clear the charging data saved in a single group; double-click the button to rotate the display content for convenient viewing. Connection method: USB-Type-C power adapter - USB-Type-C tester - load or digital device.
• We Have a Strong After-sales Service Team: As long as you have any questions about the product, we will resolve your issue immediately if received your email, your satisfactory purchase experience is our greatest hope How to email us Plz click "MakerHawk-US "and click" Ask a question "to email us! Looking for your consultation!

User questions & answers

Question:	Quick charge 3.0 & 4.0 support
Answer:	support 3.0 .can't support 4.0
Question:	Quick charge 3.0 support
Answer:	Can confirm QC2. QC3 should be continuously variable from 5V to 9V. My LG G8 together with a HyperJuice 87W charger (both support QC 3.0) jumps from 5V to 9V (5.5V to 9.5V measured by the MakerHawk). In theory QC3 would be continuously variable, but both devices seem pretty picky about charging, so am not sure whether or not the MakerHawk is preventing a QC3 negotiation.
Question:	Will this interfere with quick charging through power delivery on Samsung devices
Answer:	I don't have any Samsung devices but so far this hasn't interfered with PD charging for any other USB-C devices. I like the fact that this meter can withstand 45W PD delivery to HP Spectre x360 and even 60W PD delivery to a portable battery pack! Obviously PD negotiation is passing through to those devices.
Question:	what is the warranty of this product mine shows a little bent on the usb port already
Answer:	The warranty on mine was less than nothing. They sent me the wrong one and all they would do was tell me they were sorry I ordered the wrong one. Good luck!

Product description

Eversame Power Meter Tester

-Each Power Meter tester from Eversame will be strictly tested by our QC Department, to prove the importance we set on quality.

-Perfect for evaluating whether or not the computer, USB wall charger, USB car charger are outputting acceptable voltage and current range for the device you are connecting

-This Power Meter Tester can plugs directly into any USB socket or cable, which displays on the screen the voltage, current and capacity

-It provides you a rough estimate of the capacity of the device you are charging



Specification

Input Voltage: 3V-30V

Input Current: 0-5.1A

Accuracy: +/- 1%

Display: LED, show voltage and current simultaneously

Maximum Capacity Value: 99999 mAh

Tester three dimensional size: 60*24*14mm



Warm Tips

-This power meter tester may not support fast charging for some type of smartphones and devices.

-If any tester you bought from Eversame can’t display the correct parameters while testing your devices, please feel free to contact us firstly and our customer service team will provide quick respond and offer good solution for your compensation.





Package Included

1 x Current Voltage Test Meter



Easy-To-Reach Support

Every product includes worry-fee one year with excellent after-sale service

• MULTIFUNCTIONAL USB TESTER: USB Meter Tester is mainly used to detect USB charging current, voltage, discharge capacity, quantity of electric charge, power, timing and so on. Meanwhile multimeter USB detector can be applied to the Power Capacity Storage and Over/Low Voltage-current Protection. It allows you to find the charging problem of the USB cables, wall chargers, and car charges more easily.
• BUILT-IN MORE SAFETY: Each USB meter tester has been built-in circuit with containing CW3002D chip for accelerating Large Current Fast Charging. Plus the Interior Smart System is designed to detect safety. The multimeter tester also supports QC 2.0/3.0 high voltage test, with the function of cutting off automatically when it’s fully charged, to protect your valuable devices effectively.
• PREMIUM LCD DISPLAY: Crafted from high-grade LCD monitor with low power consumption feature, bright and clear enough to monitor the parameters on the screen. Comes with three various display modes for your choosing. Ideally be broadly applicable to test capacity and electric energy of power bank; test the maximum output current of the charger; and test charging speed and quality of data cable and charging cable.
• WIDE TESTING RANGE & SIMPLE OPERATION：Input/Output Voltage: DC3-30V, Current Range: 0-5.1A. This portable USB tester is easy to carry and enables you to put it in your bag or your pocket whenever you go.
• PACKAGE: 1X Multimeter USB Tester. 100% SATISFACTION WARRANTY: We stand behind all of our products 100%.Every item includes worry-free 12-Month with considerate customer service. Eversame always bear in mind that your satisfaction is our priority. For any reason you are unsatisfied with our product at any time, just feel free contact support for exchange or refund. Our customer service team are here and ready to assist you with any questions.

User questions & answers

Question:	I changed the backlight timeout to 5 seconds, how to you put it back to on
Answer:	Hi, we would like to tell you that backlight default time and maximum value is 59s. You can adjust the backlight time accordingly, via switching to BL:ON interface then Three clicking on button quickly to switch to the BL: 59s display. Double click on the button to increase 1s while three click on button to decrease 1s. Any question please feel free to let us know.
Question:	Does using this dongle interfere with fast charging
Answer:	Fast charging works BUT it does NOT give accurate measurements when fast charging. On a 3000mah battery there is 1000mah difference between fast charging and regular charging the same battery. I tested multiple times with the same results.
Question:	What is the minimum measurable current and power? Do readings include the power used by the monitor itself? I'm using a USB powered Arduino&devices
Answer:	It measures down to .01 A and 0.1 V. It does not include the power it is using itself. My Arduino Uno uses about 0.04 A of power with no program loaded and nothing attached so you should be able to measure whatever you need to on it.
Question:	Does it support usb 3.0, usb 2.0, or something else in terms of data speeds that it passes
Answer:	This device only has 4-pin connectors on each end. That means it is missing USB 3.0's extra 5-pin connector. So it can only do USB 2.0 and Qualcomm Quick Charge. It does pass through Quick Charge. If I put this in the center of a USB-C using a couple adapters, it is only able to pass 5V so it does not pass Power Delivery through it. I have another USB 2.0/3.0 meter that looks similar to this one, and it does have the extra 5-pin connectors on each end, but it was made before Quick Charge so it turns itself off as soon as the voltage goes up past 5v. So now I use one or the other, depending what I'm trying to measure, and a Satechi for USB-C.
Question:	Where can i download a manual from
Answer:	Hello download link: http://www.mediafire.com/folder/77ueo252py4vc/AT34

• The tester uses a new generation of power four semi~ double loop integral converter IC , with a precision bandgap reference , range accuracy , high precision , stable and reliable performance , strong anti~interference ability.
• High temperature can be used for measuring USB powered or power consumption of the interface , mobile phone charger , U disk and other products.
• Can easily measure the operating current of the output voltage of the USB port and equipment.
• Smallsize , no power , and other ancillary equipment, plug and play also detect USB charger output voltage and current are standard suitable for factories, Laboratory and users.
• USB powered devices can be used to measure air , voltage loads , USB terminal equipment working voltage and current .

User questions & answers

Question:	Can i plug this detector into the uk (240 volt current) electrical grid, then place my iphone/ipad charger into it with no chance of ruining devices
Answer:	Yes of course. This meter connects to the USB connector of your charger. and you can connect your charger wherever you want, 110v 220v or 240 v. The usb charger will ALWAYS deliver 5.0 volts of direct current. What this meter measures is the output of your charger, not the input. that meter is sandwiched between your charger and the charging cable of your phone. this meter is NOT a charger
Question:	Is the energy capacity (in mah) compensated for the voltage? inotherwords, if i charge at 9v will i read fewer mah than charge at 5v for a powerbank
Answer:	This one cannot count capacity.
Question:	I am afraid that i mave have damaged a usb port on my car. can this device by used to determine if the port is actually damaged or not? if so, how? th
Answer:	yes- connect a device that definitely needs a charge to the Diymore, then plug the Diymore into your USB port- if you do not see a voltage of about 5 volts, and some current flow (amount is not as important as the fact that it goes on and off when you connect it- If voltage comes up zero, your USB port is dead- I would check to see if your USB has a fuse someplace.
Question:	Will this USB volt meter draw enough current to act as a keep-alive for a power bank to power small devices
Answer:	No. I don't think this device will keep-alive a small device unless a phone or something is on the other side of the meter.

Product features

Feature 1

• Small size, no power, and other ancillary equipment, plug and play also detect USB charger output voltage.
• It can easily measure the operating current of the output voltage of the usb port and equipment.

Feature 2

• The current and voltage cycle , easy to use and practical.
• And current are standard suitable for factories, laboratory and users.

Feature 3

• USB powered devices can be used to measure air , voltage loads , USB terminal equipment working voltage and current .

Feature 4

• High temperature can be used for measuring USB powered or power consumption of the interface , mobile phone charger , U disk and other products.

Package Included: 1X Diymore USB Charger Doctor Current Voltage USB Tester

• Error: voltage <± 1% current <± 2%
• Resolution: Voltage 10mV current 1mA
• Operating Range: U = 3 ~ 7.5V I = 0 ~ 2.5A
• Full scale drop: ( When measuring current ) 200mV
• Scope of work: Current (0~2.5A) (It can detect mobile phone charger voltage compliance DC 5V)

Product description

Features:

1. Real-time detection of the state of charge of the appliance, voltage, current, power and other indicators;

2. The tester is widely used in the quality inspection of 3C digital and peripheral products of Type-C interface. It is the first choice for electronics enthusiasts;

3. It adopts 0.96 inch IPS high-definition color liquid crystal display, which can be connected in two directions, 160 degree wide viewing angle, high brightness and long working life;

4. Support the identification of QC2.0, QC3.0, PD, SAMSUNG quick charge protocol;

5. Internal use of professional instrument sampling circuit, coupled with unique precision algorithm, ensures the accuracy and stability of the product at the hardware and software level;

6. With power-off storage function, when the mobile power is cut off, it can store capacity and energy data, which is convenient for subsequent viewing, and is convenient for measuring the energy capacity of the mobile power source;

7. Helping us clearly understand the load resistance and current discharge power, and better understand the range of use of the load.



Specifications:

Voltage: 4-30V

Voltage resolution: 0.002V

Current: 0-5A

Current resolution: 0.002A

Capacity: 0-999999mWh

Load resistance: 1-9999.9Ω

Power: 0-150W

Energy: 0.999999mWh

Timing: 0-99 hours

Interface: USB-C 24pin

Test direction: two-way

Display: 0.96 inch color screen

Color: Black

Weight: 15G (including packaging)

Size: 55*26.5*11.5mm



Package List:

1x USB C Tester

• Real-time detection of the state of charge of the appliance, voltage, current, power and other indicators, Support the identification of QC2.0, QC3.0, PD, SAMSUNG quick charge protocol;
• The tester is widely used in the quality inspection of 3C digital and peripheral products of Type-C interface. It is the first choice for electronics enthusiasts;
• It adopts 0.96 inch IPS high-definition color liquid crystal display, which can be connected in two directions, 160 degree wide viewing angle, high brightness and long working life;
• Internal use of professional instrument sampling circuit, coupled with unique precision algorithm, ensures the accuracy and stability of the product at the hardware and software level;
• With power-off storage function, when the mobile power is cut off, it can store capacity and energy data, which is convenient for subsequent viewing, and is convenient for measuring the energy capacity of the mobile power source.

User questions & answers

Question:	Does this come with any adapters (e.g. usb-c to usb-b)? does it require external power to operate (beyond what you are using to charge device
Answer:	This is a meter only - very very small display, but reads out volts, amps....... No adapters, strictly a USB-C to USB-C and you do need a power source.
Question:	Will this do e-mark identification like the power-z kt
Answer:	Good question. Never knew about the term "e-mark identification: until now. With that said, I have put this in line with a few devices and the voltage / amperage seams to max out what the device needed. So I assume it has a chip and knows what it talking to, or it relies on the power source to do it and just passes power through. Hard to say, but your power source should know what to provide.

Product description

Specification:

Condition:100% Brand New

Item Type: USB Tester

Model: UT658A, UT658C, UT658 Dual(Optional)

Material: ABS

Color: White

Function

Description

UT658A

UT658C

UT658Dual

Input-output interface

USB Type A

USB Type C

Voltage measuring range

Current measuring range

0.05-3.00ADC, resolution ratio: 0.01A（Type-A)

0.05-5.00ADC,resolution ratio: 0.01A（Type-C)

Capacity: 0-99999mAh,resolution ratio:1mAh

Electric quantity: 0-1000Wh

Circuit equivalent resistance measurement: 1-480Ω

USB data transmission line voltage (D+,D-): 0-3.30V

Storage: 10 groups of data

Time: 99 hours 59 minutes 59 seconds, resolution ratio:1s

Support fast charge protocol

Support USB2.0 data transmission function, support qc1.0/2.0/3.0 quick charging protocol (type-A)

Support USB2.0 data transmission function, support qc1.0/2.0/3.0 quick charging protocol (type-C)

Package List:

1 x USB Tester

1 x Instruction Manual

• ▶▶Current Detector for Mobile Charging Equipment◀◀ monitors the charging status of mobile phones, Bluetooth speakers, laptops, power banks, etc., real-time measurement of multiple parameters, high accuracy, small size, convenient and flexible use.
• ▶▶Dual Interface◀◀ Type-a and Type-c dual interface, can deal with the choice of mainstream charging interface.
• ▶▶Data Storage◀◀ Up to 10 sets of data can be stored, and multiple sets of data are stored to facilitate later analysis and comparison.
• ▶▶LCD Screen◀◀ LCD screen with backlight, which can display the measured values of current, voltage, power, capacity, and loop resistance.
• ▶▶Support Fast Charging Protocol◀◀ Type-a supports USB2.0 data transmission function, supports QC1.0/2.0/3.0 fast charging protocol, Type-c supports USB2.0 data transmission function, supports QC1.0/2.0/3.0/4.0 fast Charging protocol.