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USB Ammeter Voltmeter Charging Capacity Tester Detector
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USB Ammeter Voltmeter Charging Capacity Tester Detector

- White

    COD This product supports COD on delivery. Suggestions: Do not place orders with non-COD products, otherwise you will not be able to choose COD payment method.
    Ship between: Oct 07 - Oct 09, Estimated Shipping Time: business days Order Processing Time may require a few days. Once dispatched from warehouse, Shipping (or Delivery) Time depends on the Shipping Method.
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Material: PVC
Line length is about 15 cm
Input voltage: 3V-7V
Voltage resolution: 0.01V
Test current: 0.05A-3.50A
Current resolution: 0.01A
Capacity range: 0-19999mAH
Accuracy: plus or minus 1pct
Line loss: about 0.1 ohm
Test content: battery voltage, current, discharge capacity (10 groups of data in total)

Simultaneous display of voltage and current and mAH data for easy viewing
Can detect mobile power output mAH 
Multiple sets of test data are saved, power-down save function
Does not affect data transmission
Higher precision, the current parameters will not jump
USB male and MicroUSB ports are dual-powered to detect MicroUSB line quality
Current sampling 25 milliohms, less loss
With precision current calibration, current accuracy is higher (calibrated when shipped)


Dimensions and Weight

Product weight: 0.0200 kg
Package weight: 0.0250 kg

Package Contents

Package Contents: 1 x Detector, 1 x OPP Bag

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Customer Reviews

4.73 out of 5
  • 8
  • 3
  • 0
  • 0
  • 0
See all 11 reviews Write a Review
  • AurelianT
    Yes (2) Color: Black
    good for also testing capacity, not just voltage and intensity
    I got a good price for this unit, 3.46 USD on flash sale. I chose this device over others because it also measured the capacity, not just volts and amps. It's pretty straight forward: you place this between the two devices where you want to measure the current flow. For measuring capacity, you need to keep this connected the whole time the battery charges (or the powerbank discharges). The little button helps you reset the time and capacity measurement. I have only one concern regarding this device (hence the 4 stars): the display and all the electronics soldered to it rattle inside the casing, because it appears it wasn't fixed in place before the case itself was sealed shut. This may put extra strain on the wires every time I pull out the USB plug and may shorten the lifespan of the entire unit. If the wires going out have a few extra loops inside the casing, then it's all good. Check out my comments section on the youtube video for later updates about how it holds up. This unit had the best price in its range and it is the main reason why I chose it.

    Jan 13,2019

  • Herby
    Yes (0) Color: White
    USB tester
    Works excellent for testing capacity of cellphone batteries. Just run your phone totally down then fully charge it through the tester. when fully charged read the mAh on the tester. That is the actual capacity of the battery. As the battery ages this number will fall.

    The back of my case says KCX_-17 input rating 4-30v/50ma-3000ma This is more than stated in the GB description.
    A very excellent device!!!

    Herby Ordered a spare

    Jan 27,2020

  • IgorM
    Yes (0) Color: White
    Nice tool
    Very nice and useful tool for checking battery capacity, also for amps and volts of your device.
    Like it for small size and compact size, 10 memory info about device you measuring.
    Very portable for everybody who love to play with electronic devices.

    Sep 18,2019

  • Fredy
    Yes (0) Color: White
    Muy buena herramienta para medir el voltaje, en realidad es muy útil para probar los cargadores y los cables. Me ha servido mucho, es de buen tamaño y buena calidad. Muy buena compra, nada malo que agregar....

    Nov 26,2019

  • Giorgio
    Yes (0) Color: White
    USB Ammeter Voltmeter Charging Capacity Tester Detector
    It looks fine now I have possibility to check battery of my mobile or powerbank itis good to check for ease testing it is enough. Delivery is ok 14 days from china to EU
    I hope it will good serve me

    Oct 19,2019

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There are two key factors which will affect the time you receive your items.

Item processing time
After receiving your order,we require some time to test the product to ensure its quality.The exact processing time varies depending on the item.The average processing time is 3 working days.but this can also be affected by the item's stock status. For small quantity orders,the processing time is 1-3days while larger quantity orders may require 2-5days.
Shipping methods
China Warehouse:
Shipping Type Country or Region Arrive within 1-7 Days Arrive within 8-15 Days Arrive within 16-30 Days Arrive within 31-45 Days Average Time (Days)
Unregistered Air Mail or Registered Air Mail United States 0.52% 44.87% 49.88% 3.5% 18.13
Spain, United Kingdom, Italy, Germany, France & Portugal 5.18% 43.44% 48.34% 1.17% 15
Netherlands, Greece, Poland, Hungary, Slovakia, Czech Republic 2.96% 40.34% 52.54% 3.74% 18.66
Russia 0% 4.45% 84.41% 11.1% 28
Japan, Korea 0% 21.30% 68.80% 9.66% 17.75
Brazil 0% 0% 23.91% 72.09% 38.6
Turkey 0% 37.75% 59.05% 3.1% 20.33
Thailand, Singapore & Malaysia 0% 40.39% 56.12% 2.6% 16.2
Other countries 0.7% 38.79% 47.94% 8.56% 23.57
Priority Line United States 12.28% 79.05% 7.4% 0.52% 11.75
Spain, United Kingdom, Italy, Germany, France & Portugal 8.44% 66.56% 23.45% 0.45% 13.55
Russia 0% 3.48% 75.79% 20.04% 31
Brazil 2.21% 6% 61.29% 25.46% 30
Turkey 20.42% 77% 3% 0.08% 10
Australia 7.67% 86.60% 5.68% 0% 11
Korea 97.54% 1.57% 0.89% 0% 7
Japan 95.80% 2.09% 0% 0% 6.84
Thailand, Singapore & Malaysia 58.96% 41.04% 0% 0% 8.45
Other countries 22.33% 30.8% 27.62% 17.64% 18.65
Expedited Shipping ALL countries(EMS) 3.8% 46.8% 26% 15% 14.8
ALL countries(DHL) 65.8% 25.75% 3.86% 0.37% 6.72
GW Warehouse: Typically 3-5 days to the UK, 3-7 days to other European countries.
USA Warehouse: Generally, 3-7 days to a USA address.
ES Warehouse: Generally, 2-5 days to the Spain, 3-7 days to the Portugal.
Shipping from warehouse nearest to shipping address is faster. Additional charges may apply.
Note: This is a general guide and delays maybe caused force majeure, natural disasters, inclement weather, war, public holidays, and factors outside our control. Generally speaking, we offer free shipping for USB Ammeter Voltmeter Charging Capacity Tester Detector to United States (US, USA), United Kingdom (UK, GB), Germany, Italy, France, Spain, Portugal, Poland, Brazil, Russia, Japan, Greece, Austria, Hungary, Slovakia, Czech Republic, Ireland, Lithuania, Israel, Denmark, Norway, Sweden, Canada, Australia, Netherlands, Korea, Turkey, Mexico, Ukraine, Romania, Columbia, Thailand, Singapore, Malaysia etc. Please choose the shipping methods for the final price.

Payment accepts PayPal,Credit Cards,Wire Transfer,Westem Union, YandexMoney,Webmoney,Boleto,OXXO and BKM as secure payment methods.

The most convenient payment method in the world.
Wire transfer
For orders which exceed $1,500,please contact us at
Note: please email us the order number,the amount transferred along with currency type,and the exact date of the wire transfer.
Western Union
Please contact us at for details.
Note: please email us the following information after you have paid via Westem Union:
· Control Number(10 digits)
· The exact amount sent along with the currency
· Name of sender.
· Address of sender
YandexMoney、 Webmoney
With YandexMoney and Webmoney, it is convenient and safe for you to pay via credit card、wallet or cash
For Brazil customers, we accept Boleto: you only need to fill in the payment information, remember your Boleto Voucher information and pay it within 3 days at any Boleto stores.
For Mexico customers, we accept OXXO: you can choose OXXO payment on our website, and then remember your OXXO Voucher information and pay it within 3 days at any OXXO stores.

Do you want to bulk buy ? Please submit your wholesale inquiry below. Please note we usually don’t offer free shipping on wholesale orders, but the wholesale price will be a big bargain.

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