Advanced USB Power Meter Voltage and Current Tester

Monitor the performance of your USB power sources and charging cables with this convenient portable USB voltage and current tester. Designed to measure and display volts, amps, milliamp-hours (mAh), and time elapsed as power flows through your USB connection, this tool provides valuable insight into charging efficiency and device power requirements. With an easy-to-read LCD display and a straightforward plug-and-play operation, it enables real-time diagnostics for a variety of USB-powered devices, helping to identify possible issues with cables, chargers, or power banks.

Specifications

• Measurement range: 3.0 V to 7.0V DC
• Current range:<3.4A
• Connectors: USB 2.0 Type A male to USB 2.0 Type A female
• Display: Simultaneous voltage, current, mAh, and time
• Application: USB power throughput testing and diagnostics
• Dimensions: 72 x 23 x 13 mm

Features

• Displays real-time voltage, current, milliamp-hours, and elapsed time
• Helps assess the performance of USB chargers, power banks, and cables
• Easy plug-and-play use between USB power source and device
• Assists in identifying USB power supply and cable efficiency issues
• Suitable for a wide range of USB-powered devices including phones and tablets
• Clear LCD display for easy monitoring

Advanced Features:

• Data Storage: Stores up to 10 groups of discharge capacity data for easy comparison
• Voltage Alert: LCD backlight flashes when voltage is too high or too low—press button to silence for 30 seconds
• Data Review: Double-click the button to cycle through stored data groups
• Clear Function: Hold button to reset current data group and move to the next
• USB Pass-Through: Full D+/D- communication support—device functions normally while testing

Important Notes About USB Power Testing:

• Accuracy: This is a handy diagnostic tool, not a laboratory-grade measuring device.Readings are excellent for comparative testing in home/office use but may not achieve absolute precision.
• Factors Affecting Readings: Actual power flow varies based on your device's battery level, cable quality/length, and the power source's safety features. Don't be alarmed by lower readings—they're normal.
• Device Required for Current/mAh Readings: You must have a device connected and drawing power to view current (amps) and mAh readings.