The FNIRSI FNB38 is a compact, multi-functional USB charging tester designed to accurately monitor, analyse, and verify charging performance across a wide range of devices.

Featuring a 1.44-inch full-colour TFT LCD screen, it provides real-time readings of voltage, current, power, energy, capacity, and fast-charging protocols. With support for USB-A, Micro-USB, and USB-C, the FNB38 is compatible with smartphones, tablets, power banks, chargers, and other USB-powered electronics.

This advanced tester supports modern fast-charging standards such as PD, QC, PPS, VOOC, SCP, and more - making it an essential tool for technicians, repair shops, and electronics enthusiasts.

Key Features:

• Multi-Interface Compatibility
  Supports USB-A, Micro-USB, and Type-C input/output for universal testing.
• High-Definition Colour Display
  1.44" TFT screen displays voltage, current, power, capacity, energy, and protocol status clearly.
• Wide Measurement Range
  Voltage: 4-24V
  Current: 0-5A
  Power: up to 120W
• Fast-Charging Protocol Detection
  Supports QC2.0, QC3.0, QC4+, PD2.0, PD3.0, PPS, SCP, VOOC, AFC, FCP, and more.
• Data Storage & Review
  Saves test data for later review of energy and capacity measurements.
• Upgradeable Firmware
  Supports drive-free PC firmware upgrades to remain compatible with new standards.
• User-Friendly Controls
  Screen rotation, brightness adjustment, and dual-language support (English / Chinese).
• Portable & Lightweight
  Compact size and ultra-light design for convenient everyday use.

Specifications:

• Model: FNIRSI FNB38
• Display: 1.44-inch TFT colour screen
• Voltage Range: 4-24V
• Current Range: 0-5A
• Power Range: 0-120W
• Fast-Charge Protocols: QC2.0 / QC3.0 / QC4+ / PD2.0 / PD3.0 / PPS / SCP / VOOC / AFC / FCP
• Interfaces: USB-A / Micro-USB / USB Type-C
• Data Storage: Supported
• Firmware Upgrade: Supported (PC, drive-free)
• Languages: English / Chinese
• Functions: Data review, screen flip, brightness adjustment
• Dimensions: 73 × 36 × 12 mm
• Weight: 21 g

Common Uses:

• Testing and verifying USB charger performance
• Measuring real charging power of power banks
• Detecting faulty or low-quality charging cables
• Monitoring energy consumption of USB-powered devices
• Ensuring compatibility with fast-charging standards

Ideal For:

Technicians, electronics repair shops, engineers, hobbyists, and anyone working with USB charging and power analysis.

What's in the box
1 x FNIRSI FNB38 USB Charge Tester
1 x User Manual