Description
The FNIRSI FNB58 USB Fast Charge Tester is a state-of-the-art digital measuring instrument meticulously engineered for accurate, real-time monitoring and analysis of voltage, current, power, energy, and capacity across multiple USB interfaces. Designed for electronics engineers, repair technicians, R&D professionals, and tech enthusiasts, the FNB58 combines powerful performance, high precision, and user-friendly operation in a sleek, compact design.
In an era of rapidly evolving fast-charging technologies, having a reliable and intelligent USB power tester is essential. The FNB58 stands as one of the most versatile and comprehensive USB test devices available, supporting a wide range of fast-charging protocols and advanced diagnostic features. From testing chargers and cables to analyzing the performance of power banks and mobile devices, it is the perfect companion for anyone working with USB-based power systems.
High-Definition 2.0-Inch IPS Color Display
At the heart of the FNB58 is a 2.0-inch IPS color display, offering crisp visibility and vibrant color contrast from any viewing angle. The full-color interface allows users to easily interpret data in different formats, including numerical, graphical, and waveform displays. This flexibility ensures that users can view both real-time and historical power behavior with exceptional clarity.
The intuitive layout enables seamless navigation through multiple data screens, showing voltage, current, power, energy, temperature, and protocol information in one place. Whether used in bright laboratory lighting or dim workshop conditions, the IPS display ensures clear readability and accurate interpretation.
Additionally, the display supports automatic rotation, allowing both vertical and horizontal orientations for maximum comfort and convenience. This is especially helpful when the device is connected to USB ports at awkward angles or used in tight spaces.
Comprehensive Fast-Charging Protocol Support
One of the standout capabilities of the FNB58 Fast Charge Tester is its support for an extensive list of modern fast-charging protocols. It can automatically detect and display the active charging standard in real time, making it an indispensable tool for verifying compatibility and performance between chargers and devices.
The supported protocols include:
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USB Power Delivery (PD 2.0/3.0)
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Qualcomm Quick Charge (QC 2.0/3.0)
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Huawei FCP and SCP
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Samsung AFC (Adaptive Fast Charging)
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VOOC (used in OPPO and Realme devices)
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PE (Pump Express)
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Apple 5V/2.4A charging standard
This comprehensive compatibility ensures that the FNB58 can handle virtually any modern charger, cable, or mobile device. For professionals who frequently test different charging systems, the ability to identify the active protocol automatically eliminates guesswork and streamlines diagnostics.
PD Trigger Function for Voltage Selection
Beyond passive measurement, the FNIRSI FNB58 includes an active PD (Power Delivery) trigger function — one of its most powerful and useful features. With this function, users can manually select and trigger specific voltage outputs such as 5V, 9V, 12V, 15V, and 20V directly from compatible USB-C PD chargers.
This feature is essential for testing and validating USB-C PD adapters, as it allows users to simulate real-world charging conditions and verify that a charger delivers the expected voltage levels. Engineers can perform step-by-step voltage testing, measure power delivery behavior, and ensure that PD devices meet compliance and performance standards.
The PD trigger also helps identify faulty or incompatible chargers and cables, making the FNB58 invaluable for charger development, repair, and quality assurance testing.
Multi-Interface Support for Maximum Compatibility
To ensure maximum flexibility, the FNB58 is equipped with multiple connection interfaces, including USB-A, USB-C, and Micro-USB ports. This allows users to test a wide range of devices and accessories without the need for adapters.
The inclusion of these interfaces enables seamless testing across all major USB device types — from traditional USB-A chargers to the latest USB-C PD power adapters. Whether you’re testing mobile chargers, car chargers, cables, power banks, or wall adapters, the FNB58 provides a universal testing platform for accurate and efficient diagnostics.
Exceptional Measurement Range and Precision
The FNB58 USB Tester offers an impressive measurement range suitable for both low-power and high-power applications. With a voltage range of 4.5V to 58V, current range of 0A to 5.1A, and maximum power measurement up to 299W, it provides extensive coverage for almost any USB power configuration.
This wide dynamic range makes it perfect for everything from smartphone chargers and power banks to high-wattage USB-C laptop adapters. The built-in high-precision sensors and calibration algorithms ensure that all readings — including voltage, current, power, and energy — are accurate to a fine degree, ensuring trustworthy performance data.
The device continuously samples data at high speed, offering real-time tracking of charging behavior, power fluctuations, and efficiency levels. This enables users to detect inconsistencies, voltage drops, and potential faults in real time.
Data Recording and Storage Capabilities
For engineers and professionals who require in-depth testing data, the FNB58 includes data recording and storage functionality. Users can save up to 10 groups of measurement results directly on the device for future reference.
This allows easy comparison between different chargers, cables, or devices without the need for manual note-taking. Additionally, the FNB58 supports PC connectivity via USB, allowing users to export and analyze data using compatible software. This advanced functionality enables graphical power analysis, long-term testing, and performance charting, which are essential for R&D and quality assurance tasks.
Durable Aluminum Alloy Construction
Built for durability and long-term use, the FNIRSI FNB58 features a robust aluminum alloy shell that not only enhances its professional appearance but also serves an important functional purpose. The metal casing provides excellent heat dissipation during prolonged testing sessions and protects internal components from physical damage.
The sturdy design ensures the tester can withstand daily use in demanding environments such as repair shops, laboratories, and field service operations. Despite its solid build, the FNB58 remains compact and lightweight, allowing users to carry it effortlessly in a toolkit or pocket.
Comprehensive Safety Protection
Safety and reliability are at the forefront of the FNB58’s design. It incorporates multiple layers of protection to safeguard both the device and connected equipment during testing.
The built-in protection systems include:
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Over-voltage protection (OVP)
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Over-current protection (OCP)
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Over-power protection (OPP)
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Reverse connection protection
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Over-temperature protection (OTP)
An internal temperature sensor continuously monitors operating conditions, automatically triggering thermal protection if the temperature exceeds safe limits. These safety mechanisms ensure that users can test with confidence, even when dealing with high-power USB PD adapters or sensitive electronic devices.
Applications and Use Cases
The versatility of the FNB58 USB Fast Charge Tester makes it suitable for a wide variety of professional and hobbyist applications, including:
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Charger and Power Bank Testing: Evaluate real power output, efficiency, and performance under different loads.
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Cable Quality Verification: Detect voltage drops and measure resistance across different USB cables.
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Device Charging Analysis: Monitor smartphone, tablet, and laptop charging behavior to verify compatibility and charging speed.
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Research and Development: Conduct detailed USB PD and QC protocol testing for product design and validation.
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Repair and Troubleshooting: Identify faulty adapters, ports, or cables quickly and accurately.
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Educational and Training Use: Teach students and trainees about USB power systems, fast-charging protocols, and electrical measurement.
The FNB58 is a universal diagnostic tool for modern electronics professionals, combining high precision with practical usability for everyday tasks.
User-Friendly Interface
Despite its professional-grade capabilities, the FNIRSI FNB58 is designed with an intuitive interface that makes it easy for users of all experience levels to operate. The control buttons and menu navigation are straightforward, allowing users to switch between display modes, access saved data, and trigger PD voltages effortlessly.
Its auto-detection feature simplifies operation further by automatically identifying the type of connection, active charging protocol, and power conditions without manual configuration.
Conclusion
The FNIRSI FNB58 USB Fast Charge Tester redefines portable USB power analysis with its combination of precision, durability, and smart functionality. With support for multiple fast-charging protocols, PD trigger capabilities, and real-time graphical monitoring, it delivers comprehensive insight into the performance of chargers, cables, and devices.
Whether you are a professional electronics engineer, a technician, or an enthusiast who wants to understand how your devices charge, the FNB58 provides all the tools needed for accurate, detailed, and safe power measurement. Its robust aluminum design, high-definition display, and advanced protection systems ensure reliable operation in any environment.
