KEWEISI KWS-10VA USB TESTER AMMETER-VOLTMETER

The KEWEISI KWS-10VA USB Tester Ammeter-Voltmeter is a handy diagnostic instrument for checking the electrical performance of USB power sources and connected devices. It measures voltage and current through a USB connection, allowing users to observe how much voltage a charger supplies and how much current a connected device draws.

The tester features a dual LED display for convenient monitoring of both measurements. Its USB Type-A male input and USB Type-A female output make it easy to connect between a charger, power bank, computer port, and compatible USB device.

With a measurement range of 3–20V DC and 0–3A DC, the KWS-10VA is useful for checking ordinary USB charging systems, comparing USB cables, and troubleshooting charging-related issues.

Features

• Dual Digital Display: Displays voltage and current readings for convenient monitoring.

• Voltage Measurement: Measures DC voltage from 3V to 20V.

• Current Measurement: Measures current from 0A to 3A.

• High Measurement Accuracy: Published measurement tolerance of approximately ±1%.

• Plug-and-Play Operation: Connects directly to a USB power source without an external power supply.

• USB Type-A Interface: Features a male input and female output connection.

• Compact and Portable: Lightweight design makes it convenient for technicians and electronics hobbyists.

• Power Source Testing: Helps evaluate USB chargers, adapters, and power banks.

• Cable Performance Checking: Helps identify voltage drops caused by unsuitable or poor-quality USB cables.

Applications

• USB mobile phone charger testing

• Power bank voltage and current monitoring

• USB cable performance testing

• Laptop and desktop USB port testing

• USB adapter troubleshooting

• Electronics repair and maintenance

• DIY electronics and laboratory experiments

• USB-powered device current monitoring

How to Use

1. Connect the USB Type-A male plug to a compatible charger, power bank, or computer USB port.

2. Connect your USB-powered device or charging cable to the tester's USB Type-A female output.

3. Switch on the power source if necessary.

4. Observe the voltage and current readings on the digital display.

5. Compare readings between different chargers or USB cables to identify possible performance differences.

6. Disconnect the tester after completing the measurement.

Important Notes

• The tester supports voltage measurements from 3V to 20V and current measurements up to 3A.

• Do not exceed the specified measurement limits.

• This model uses standard USB Type-A connections; it is not a direct USB-C tester.

• USB fast-charging protocols and advanced communication features may not be fully supported.

• Current readings depend on the connected device's actual power demand.

• The tester itself consumes a small amount of current during operation.

• Measurement results are intended for USB power monitoring and basic troubleshooting, not laboratory-grade electrical certification.

Package Includes

- 1 × KEWEISI KWS-10VA USB Tester Ammeter-Voltmeter