FNIRSI® FNB58 USB Fast Charge Tester is a professional USB power analyzer and fast charging protocol tester designed for measuring voltage, current, power, capacity, energy, cable resistance, and charging protocols across USB-powered devices. Equipped with a 2.0-inch TFT color display, integrated USB-A, USB Type-C, and Micro-USB interfaces, the FNB58 supports nearly all major fast charging protocols including PD, QC, VOOC, SCP, AFC, and more. It also features waveform recording, E-Marker cable detection, PD monitoring, and data logging, making it an essential tool for engineers, technicians, repair professionals, and electronics enthusiasts.
FNIRSI® FNB58 USB Fast Charge Tester Datasheet








| Parameter | Value |
|---|---|
| Brand | FNIRSI® |
| Model | FNB58 |
| Product Type | USB Fast Charge Tester |
| Display | 2.0-inch TFT Full Color LCD |
| ADC Resolution | 16-bit High Precision ADC |
| PD Controller | Dedicated PD Protocol Physical Chip |
| Parameter | Value |
|---|---|
| Voltage Measurement | 4V – 28V |
| Current Measurement | 0 – 7A |
| Power Measurement | 0 – 140W |
| D+ / D- Voltage | 0 – 3.3V |
| Cable Resistance | 0 – 9999.9Ω |
| Load Equivalent Resistance | 0 – 9999.9Ω |
| Capacity Measurement | 0 – 9999.99Ah |
| Energy Measurement | 0 – 9999.99Wh |
| Temperature Display | °C / °F |
| Device Running Time | 99 Days 23:59:59 |
| Data Recording Time | 99 Days 23:59:59 |
| Protocol | Support |
|---|---|
| USB PD 2.0 | Yes |
| USB PD 3.0 | Yes |
| Qualcomm QC2.0 | Yes |
| Qualcomm QC3.0 | Yes |
| Huawei FCP | Yes |
| Huawei SCP | Yes |
| Samsung AFC | Yes |
| MediaTek PE | Automatic Detection |
| OPPO VOOC | Yes |
| WARP Charge | Yes |
| Super VOOC 1.0 | Yes |
| Super VOOC 2.0 | Yes |
| QC2.0 → PD2.0 Conversion | Supported |
| Function | Support |
|---|---|
| Real-Time Voltage Monitoring | Yes |
| Real-Time Current Monitoring | Yes |
| Real-Time Power Monitoring | Yes |
| Capacity Statistics | Yes |
| Energy Statistics | Yes |
| Internal Resistance Measurement | Yes |
| Cable Resistance Test | Yes |
| D+ / D- Voltage Detection | Yes |
| Startup Time Recording | Yes |
| Onboard Temperature Monitoring | Yes |
| PD Communication Monitoring | Yes |
| Analog DASH Cable | Supported |
| E-Marker Cable Reading | Supported |
| DASH Cable Data Reading | Supported |
| Parameter | Value |
|---|---|
| Data Storage | 10 Independent Groups |
| Waveform Recording | Supported |
| Low-Speed Sampling | 2 SPS – 100 SPS |
| High-Speed Ripple Sampling | Up to 4MSPS |
| Waveform Display | Supported |
| Data Logging | Supported |
| Parameter | Value |
|---|---|
| USB-A | Integrated |
| USB Type-C | Integrated |
| Micro-USB | Integrated |
| Firmware Upgrade | Supported |
| PC Software Support | Supported |
| Parameter | Value |
|---|---|
| Display Size | 2.0 Inches |
| Display Type | TFT Full Color LCD |
| Construction | Portable Handheld Design |
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1 x FNIRSI® FNB58 USB Fast Charge Tester
Due to the type of products we sell, we accept limited returns. Below are the conditions where we can accept a return request.
If you receive a product damaged during shipment, please notify us within 3 days of receiving the product, supported by proper pictures and a description. Once our support team accepts the return, we will provide a replacement or a complete refund, including the return shipping cost.
If your item looks different from what is shown in the image on our website, we will take the item back and provide a refund or replacement as per your choice.
We don’t accept returns for products damaged due to improper use. Moreover, we don’t accept returns if the ordered product is not suitable for a specific application. Please read the product specifications and datasheet carefully before placing an order. Returns are accepted only within 3 days from the date of delivery.
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For any questions related to shipping, please contact our support team at support@quartzcomponents.com.
Note: The minimum order value for COD orders is ₹500.