Add to Cart Buy Now

Ship to United Kingdom , USD
  • OLED 128x64 USB Tester DC Voltmeter Current Voltage Meter Power Bank Battery Capacity Monitor QC3.0 Phone Charger Detector
  • OLED 128x64 USB Tester DC Voltmeter Current Voltage Meter Power Bank Battery Capacity Monitor QC3.0 Phone Charger Detector
  • OLED 128x64 USB Tester DC Voltmeter Current Voltage Meter Power Bank Battery Capacity Monitor QC3.0 Phone Charger Detector
  • OLED 128x64 USB Tester DC Voltmeter Current Voltage Meter Power Bank Battery Capacity Monitor QC3.0 Phone Charger Detector
OLED 128x64 USB Tester DC Voltmeter Current Voltage Meter Power Bank Battery Capacity Monitor QC3.0 Phone Charger Detector

OLED 128x64 USB Tester DC Voltmeter Current Voltage Meter Power Bank Battery Capacity Monitor QC3.0 Phone Charger Detector COD

Pre-orders Pre-orders
  • GBP £
  • USD US$
  • EUR
App only:

Follow the steps below:

  • 1.Add the product(s) to your cart or wishlist.
  • 2.Open the Banggood app and find the product(s) in the cart or wishlist.
  • 3.Pay for your order and get your discount !
  • Click here for more app only deals.
Scan the QR Code to save more.
Download APP to get an exclusive 10% off coupon

Buy more and save more

  • 1-2 US$00.00
  • 3-9 US$00.00
  • 10-29 US$00.00
  • 30-99 US$00.00
  • 100-300 US$00.00
Special Request: Wholesale Inquiry
Ship From:
  • CN
This warehouse can not ship to your location.
(Earn BG points)
Ships from Array.warehouse Warehouse
Total price: (Earn BG points)
Return Policy:
14-day refund or replacement
You can return this product within 14 days after delivery to receive a replacement or a refund. View details
  • Refer & get $3
  • Price alert
  • Report error

      Hot Products Related To This Item


        To confirm that this part fits your vehicle, please enter your vehicle's details below.
        • Year:
          • Make:
            • Model:
              • Submodel:
                • Trim:
                  • Engine:
                    • Clear All
                    This part is compatible with 0 vehicle(s). Show all compatible vehicles
                    This part is compatible with 1 vehicle(s) matching
                    This part is not compatible with
                    Recent searches
                      • Year
                      • Make
                      • Model
                      • Submodel
                      • Trim
                      • Engine

                        Multifunction wide voltage type (3-30V) 0.96" OLED USB  Security Monitor .Voltage, current, capacity, Electrical voltage, power, timing and other data, a screen display, Take-all measure!

                        • This test can be a USB charging current, voltage, discharge capacity,Quantity of electric charge,power, timing, intelligent devices.
                        •  It can be very easy to find digital device charging problem.
                        •  Tester three dimensional size 65 * 24 * 14mm                                                                                   
                        •  The only button on the tester is used to view and test data switch, The tester can be powered down to save dat
                        Function Key Descriptions:
                        Long press: display after-sale interface on the front page; the reset function on the interface of magnification capacity and electric quantity 
                        Double-click: capacity zero clearing
                        Three-click: electric quantity zero clearing
                        (electric quantity and capacity with PW CUT MEMORY)
                        Four-click: cumulative time reset to zero
                        Five-click: enter into charging timing and cut-off duration settings 
                        1. 100% Brand New and High Quality. 
                        2. This is the mini USB meter. It can measure  voltage, current, power and capacity. 
                        3. It can clearly display all the data. Can easily measure  the USB port and device operating current and the output voltage charge-discharge capacity, performance, and judge the performance of the charging cable charging equipment 
                        4. This tester can meet the requirements! Fit to factories, laboratories and personal use wide range 
                        5. Easy to use, easy to take alone, no additional power supply 
                        6. Support  QC2.0, Compatible  QC3.0, BC1.2, Apple voltage range 
                        7. Support  USB double-sided plug 
                         8. Suiable for testing PC USB, cell phone charger, car charger , mobile power , etc.
                        1. Model: J7-4T
                        2. Material: Plastic 
                        3. Color:  Black 
                        4. Voltage: 3.0000-30.000V 
                        5. Current: 0-5.1000A 
                        6. Operating temperature: -10 - 60°C 
                        7. Size: 65 x 24 x 14mm
                        8. Input Voltage: 3.0000V - 30.000V
                        9.Input current : 0 - 5.1000A 
                        10.Cumulative capacity range: 0-99999 mah precision: 0.001 Ah
                        11.Charge accumulation scope: 0-999999 MWH precision: 0.001 Wh
                        12.Cumulative power range: 0-299.999W precision: 0.001W
                        13.Timing the maximum range: 0-999 hours 59 minute 59 seconds precision: 1 second
                        14.Parameters that you can test: Voltage of battery. Current of battery, discharge capacity of battery,Quantity of electric charge,power of battery,timing.
                        15.Communication function: Yes
                        16. Parameters adjusting function :Yes. Equipment for parameters adjustment: One electronic load,one constant current  source. Voltage of constant current source should be set to 8.5V 
                        There are 3A, 2A, 1A and 0.3A models for current adjusting.
                        Here is a example for 3A:
                        When you set electronic load at 3A model, the current will be adjusted step by  step.
                        It will cost you about 10 seconds and you can see the result changing procedure in the OLED screen.
                        When you see the 3A result shown in OLED  screen, the  adjustment process is finished. You can shut
                        off the electronic load and the  parameters will be saved automatically.
                        17. Clean the data : Push the button until the parameters changed to next sets of  parameters. Then release the button.
                        Then the next sets of parameters will be started and they will start from zero.
                        18.  Over voltage or under voltage : Over voltage or under voltage,OLED screen displays a warning symbol and issue rapid beep beep sound.
                        19.  Turn on mode l: The oled screen will show all parameters within 1s when you connect power supply by Micro USB or male plug of USB with wire.(It is to check whether the OLED screen  is good or not).Then you can see the parameters used last time(capacitor and  which set of parameters). You also can see the current voltage, current and over  voltage or under voltage. Please see following illustration.
                        USB output port can be connected to a data line, a discharge resistor or the  like cable device comprising a data communication function, the data does not affect the data transmission line.
                        Test specifications, voltage can not exceed 30V, current can not exceed 5.1A.
                        Note:When the voltage is lower than 3V on the instrument display No display screen or higher than 22V,oled screen displays a warning symbol and issue rapid beep beep sound, it does not affect the use.
                        Application examples
                        Because mobile phones and digital devices at low battery or full charge, the  current and voltage is not a stable value,
                        the application example of the discharge
                        device is a USB 1A or 2A discharge resistor.
                        Note: This data is mobile power discharge capacity, the battery capacity is not, according to our experience, the discharge capacity is about 1.9 times the battery capacity.  
                        The former Test Reference Manual Tester discharge capacity value is cleared,and the mobile power is fully charged.
                        Package Include
                        1 x OLED USB Voltage Current Detector Mobile Power USB Charger Tester Meter

                        Detail Pictures:

                        Shipping Methods

                        The total estimated time it takes to receive your order is shown below:
                        • You place your order
                        • (Processing time)
                        • We ship your order
                        • (Shipping time)
                        • Delivery!
                        Total Estimated Delivery Time
                        The total delivery time is calculated from the time your order is placed until the time it is delivered to you. Total delivery time is broken down into processing time and shipping time.
                        Processing time: The time it takes to prepare your item(s) to ship from our warehouse. This includes preparing your items, performing quality checks, and packing for shipment.
                        Shipping time: The time for your item(s) to travel from our warehouse to your destination.
                        Recommended shipping methods for your country/region are shown below:
                        Ship to:
                        United Kingdom
                        • United Kingdom
                        • Ireland
                        Ship From
                        CN Warehouse
                        • CN Warehouse
                        • HK Warehouse
                        • USA Warehouse
                        • FR Warehouse
                        • AU Warehouse
                        • UK Warehouse
                        • GWTR Warehouse
                        • RU Warehouse
                        • ES Warehouse
                        • CZ Warehouse
                        This warehouse cannot ship to your location.
                        Shipping method(s) Shipping time Tracking information
                        (1) The shipping time mentioned above refers to the estimated time of business days that the shipment will take after an order has been shipped.
                        (2) Business days do not include Saturday/Sunday and any public holidays.
                        (3) These estimates are based on normal circumstances and are not a guarantee of delivery times.
                        (4) We are not responsible for the failures or delays in delivery resulting from any force majeure event, such as natural disaster, bad weather, war, customs issues, and any other event beyond our direct control.
                        (5) Expedited shipping can not be used for PO Box addresses

                        Payment methods

                        We support the following payment methods.Click for more information if you are confused about how to pay.
                        *We currently offer COD payments for Saudi Arabia, United Arab Emirates, Kuwait, Oman, Bahrain, Qatar, Thailand, Singapore, Malaysia, Philippines, Indonesia, Viet Nam, India. We will send a confirmation code to your mobile phone to verify that your contact details are correct. Please ensure you follow all the instructions contained in the message.
                        *Paying with Installment (credit card) or Boleto Bancário is only available for orders with shipping addresses in Brazil.

                        Bulk Buy Discounts

                        Order 3 or more and enjoy the savings. Bulk prices will be shown in the shopping cart.
                        • Qty (unit)
                        • 1
                        • 3
                        • 10
                        • 30
                        • 100
                        • Price £

                        Wholesale Inquiry

                        • *
                        • *
                        • *
                        • 0/300
                        • *
                        • United Kingdom
                          • United Kingdom
                          • Ireland
                        • *
                        • Submit

                        Customers Who View This Item Also Bought

                          Customer Reviews

                          Customer Q&As

                          ASK A QUESTION
                          How to quickly get a new good answer?
                          1.For questions about shipping, orders, discounts, etc. Please contact customer service, your problem will be solved faster than ask a new question.
                          2. Ask the question in English.
                          3.Keep your question short and to the point.

                          Questions: 0/2000

                          Customers Who View This Item Also View

                            You Viewed
                              Download APP to get an exclusive 10% off coupon

                              Download our Cool FREE App!

                              Online Shopping at

                              We believe in providing not only hot gadgets and great gifts but also the best support and service. We've been delivering best bang for your buck for over 10 years, every item we stock is carefully selected to ensure we offer you top quality at competitive prices.
                              • Over 200,000 products
                              • Hot deals on top brands
                              • Professional customer service
                              • Free or low cost shipping
                              • Fast local delivery
                              • Join us
                              • Email

                              • Password

                              • Confirm password

                              • Verification code

                              • I agree to Term of Use and Privacy Policy

                                Please make sure you agree to our Terms and Conditions.