FNIRSI FNB-C2 USB Tester with 1.44 inch TFT, 4-28V/0-7A, PD/QC/PPS Trigger & Detection

Most inline USB meters only show voltage and current, but the FNIRSI FNB-C2 goes much further. This pocket-sized tester combines precision measurement, fast-charge protocol detection and triggering, and long-term data logging in one device. It is ideal for troubleshooting slow charging, verifying power bank capacity, or evaluating USB-C cable performance.

Highlights

• 1.44-inch TFT colour LCD with comprehensive readouts
• Detects QC2.0, QC3.0, PD2.0, PD3.0, PPS, Apple 2.4A, BC1.2, AFC, FCP, SCP
• Triggers QC2.0, QC3.0, PD2.0, PD3.0, and PPS for protocol verification
• Measures voltage, current, power, capacity, energy, impedance, and temperature
• High resolution: 0.0001V / 0.0001A / 0.001W
• Built-in data storage for multiple logging groups

In daily use

Connect the tester between your charger and device using the USB-A or USB-C input. The TFT display instantly shows live voltage, current, power, and selected fast-charge protocol. For capacity testing, run a constant-current discharge through a load to measure accumulated mAh and Wh. With the temperature sensor, you can also keep an eye on the thermal behaviour of your setup. The trigger function lets you manually activate fast-charge modes to verify compatibility.

Full specifications

• Display: 1.44-inch TFT Colour LCD
• Voltage measurement range: 4–28V DC
• Current measurement range: 0–7A DC
• Power measurement range: 0–196W
• Voltage resolution: 0.0001V
• Current resolution: 0.0001A
• Power resolution: 0.001W
• Capacity accumulation range: 0–99999mAh
• Energy accumulation range: 0–99999Wh
• Load impedance measurement range: 1–9999.9Ω
• Temperature measurement range: -10°C to 100°C
• Supported fast charge protocols (detection): QC2.0, QC3.0, PD2.0, PD3.0, PPS, Apple 2.4A, BC1.2, AFC, FCP, SCP
• Supported fast charge protocols (trigger): QC2.0, QC3.0, PD2.0, PD3.0, PPS
• Input ports: USB-A Male, USB-C Male
• Output ports: USB-A Female, USB-C Female
• Data storage: Yes, multiple groups
• Measurement accuracy: ±(0.1% + 2 digits)
• Refresh rate: 2Hz
• Operating temperature: -10°C to 60°C
• Power consumption: <0.5W

Final note

The FNIRSI FNB-C2 is a versatile tool for anyone who needs to diagnose USB power delivery, verify fast-charge compatibility, or simply monitor energy consumption with precision.