FNIRSI FNB48S USB Tester – High Precision 1.77″ Color Screen Voltmeter Ammeter with PD/QC Protocol Trigger & Bluetooth Support

Overview 📝

The FNIRSI FNB48S is a professional-grade USB power tester featuring a 1.77-inch high-definition color TFT display. Whether you are testing the health of a smartphone battery, checking the actual output of a solar power bank, or identifying fake “Fast Chargers,” the FNB48S provides laboratory-level accuracy. It features independent ports for USB-A, Micro-USB, and Type-C, making it compatible with almost every cable on the market.

Key Features ✨

• Protocol Triggering: Automatically detect and “trick” chargers into outputting specific voltages (PD, QC2.0/3.0, Samsung AFC, Huawei FCP/SCP, and VOOC/DASH).

• High Precision: 6-digit resolution for voltage and current measurements ($0.00001V$ and $0.00001A$ accuracy).

• Cable Resistance Test: Measure the quality of your USB cables to see if they are causing slow charging.

• Bluetooth Connectivity: (On supported versions) Sync data to your PC or Android phone for real-time graphing and logging.

• Offline Logging: Records capacity ($mAh$), energy ($Wh$), and time even when disconnected from a computer.

• Gravity Sensing: The screen automatically rotates based on how you plug it in—always readable!

Technical Specifications