FNIRSI FNB58 USB Fast Charge Tester

The FNIRSI FNB58 is a high-precision USB power meter and fast-charge protocol tester, essential for verifying the charging health of your FPV radios, digital goggles, and action cameras. Whether you are checking if your transmitter is successfully negotiating a USB-PD connection or measuring the true capacity of a goggle power bank, this tool provides instant, five-digit precision feedback.

Key features

• 2.0-inch full-colour LCD with an integrated gravity sensor for automatic screen rotation.

• Comprehensive fast-charge protocol decoding and triggering, including USB-PD, PPS, QC4.0, and Apple profiles.

• Built-in E-Marker and DASH cable detection to verify wire quality and capabilities before pushing high currents.

• Real-time curve graphing to visually monitor voltage and current fluctuations during the charging cycle.

Specifications

• Input voltage: 4-28V

• Input current: 0-7A

• Measurement resolution: 0.00001V, 0.00001A

• Supported protocols: USB-PD, PPS, QC2.0/3.0/4.0, AFC, FCP, SCP, Apple 2.4A

• Interfaces: USB-A (In/Out), Type-C (In/Out), Micro USB (In)

• Display: 2.0-inch LCD

A necessary bench tool to eliminate the guesswork from your Type-C cables and smart chargers before relying on them in the field.