Fnirsi FNB48P BT USB Port Tester with Bluetooth

The FNIRSI FNB48P BT is an advanced USB port tester featuring a Bluetooth module, engineered for precise analysis of charging processes. It supports multiple interfaces and a wide array of fast charging protocols, operating with high current to allow for accurate monitoring of voltage, current, and power. The device offers intelligent cable diagnostics, comprehensive data recording, clear graphical visualization, and automatic screen orientation. Housed in a durable CNC-milled metal casing and powered by a high-performance ARM processor, it serves as a reliable tool for both professional service technicians and electronics enthusiasts.

Advantages

This tester provides exceptional versatility by supporting USB-A, USB-C, and Micro USB interfaces, making it compatible with a vast range of modern and legacy devices. It features laboratory-grade precision with a high-resolution readout, allowing users to track even the smallest fluctuations in power parameters in real time. The integration of Bluetooth connectivity enables seamless data analysis and archiving via a dedicated application, while the robust metal housing ensures long-term durability and protection of internal components. Furthermore, the device simplifies complex diagnostics through automatic protocol detection, intelligent cable resistance measurement, and intuitive graphical data representation.

Suitable for

• Testing and verifying fast charging protocols for smartphones and tablets
• Measuring the internal resistance and quality of USB cables
• Diagnosing power issues in chargers and power banks
• Monitoring real-time power consumption of USB-powered electronics
• Analyzing battery capacity and charging efficiency

When it may not be suitable

This device is designed for diagnostic and analytical purposes and may not be necessary for casual users who only require basic charging functionality without the need for detailed technical data. It is also not intended for high-voltage industrial power systems exceeding its specified operating range.

Key specifications

• Voltage range: 4–24 V
• Current range: 0–6.5 A
• Power range: 0–156 W
• Display: 1.77-inch HD screen
• Supported protocols: Apple 2.4A, QC2.0, QC3.0, USB PD, Samsung AFC, Huawei FCP/SCP, OPPO VOOC, DASH, WARP, SuperVOOC, PE+
• Processor: High-performance ARM
• Connectivity: Bluetooth and PC interface

How to use

To begin, connect the FNIRSI FNB48P BT between your power source and the device under test using the appropriate USB interface. Once powered, the screen will display real-time voltage, current, and power data. Use the function buttons to navigate through the menu to select specific protocols, view graphs, or initiate cable resistance tests. For advanced data logging and remote monitoring, pair the device with the compatible mobile application via Bluetooth. The gravity sensor will automatically adjust the screen orientation for optimal readability during your measurements.

What to consider before purchase

• Ensure your devices utilize compatible USB-A, USB-C, or Micro USB ports
• Verify that the voltage and current requirements of your equipment fall within the tester's specified ranges
• Consider if you require the Bluetooth functionality for remote data logging or if standard on-device monitoring is sufficient

Usage recommendations: Always ensure the device is securely connected to avoid intermittent contact during high-current testing. When measuring cable resistance, follow the on-screen prompts to perform the two-step constant current load test for the most accurate results. Keep the firmware updated via the PC interface to ensure compatibility with the latest charging protocols.