USB Power Meter Voltage Current Tester | PD QC 3.0 HD Display
USB Power Meter Voltage Current Tester | PD QC 3.0 HD Display
USB Power Meter with 1.77" HD Display — Monitor Voltage, Current & Fast Charge Protocols in Real Time
Take full control of your charging setup with this compact USB Power Meter Voltage & Current Tester. Featuring a vibrant 1.77-inch TFT HD display, this pocket-sized device gives you instant, accurate readings of voltage, current, power, energy consumption, capacity, and cable resistance — all in one tester. Whether you're a tech enthusiast, electronics DIYer, or simply want to verify your chargers and cables are performing as expected, this tool delivers the data you need.
Made in Mainland China.
Key Features
- 1.77" TFT HD Display: Real-time readouts of voltage, current, and power keep you informed of your charging status at a glance.
- Fast Charge Protocol Detection: Fully compatible with PD, QC 2.0, QC 3.0, and other fast-charging protocols — works across a wide range of modern devices and chargers.
- 7 Selectable Display Interfaces: Switch between intuitive views to match your monitoring needs, making operation simple and personalized.
- Comprehensive Data Monitoring: Simultaneously tracks voltage, current, power, fast-charge protocol status, energy consumption (Wh), and capacity (Ah) for a complete picture of charging performance.
- Cable Resistance Measurement: Uses the voltage-drop method to automatically calculate USB cable resistance — helping you identify low-quality or degraded cables that reduce charging efficiency.
- Long Recording Time: Logs device operation for up to 99 days, 23 hours, 59 minutes, and 59 seconds; recording time up to 999 hours, 59 minutes, 59 seconds.
- Compact & Portable: Slim 65 × 35 × 12.5 mm form factor fits easily in any toolkit or pocket.
Full Specifications
| Monitoring Voltage | DC 4–24V | Resolution: 0.00001V | Accuracy: ±(0.2%+2) |
| Monitoring Current | 0–6.5A | Resolution: 0.00001A | Accuracy: ±(0.5%+2) |
| Monitoring Power | 0–156W | Resolution: 0.00001W | Accuracy: ±(0.5%+2) |
| D+/D- Voltage | 0–3.3V | Resolution: 0.001V | Accuracy: ±(1.0%+2) |
| Capacitance | 0–9999.99Ah | Resolution: 0.00001Ah |
| Energy Consumption | 0–9999.99Wh | Resolution: 0.00001Wh |
| Cable Resistance | 0–9999.9Ω | Resolution: 0.0001Ω |
| Device Operating Time | Up to 99 days 23 hrs 59 min 59 sec | Resolution: 1 second |
| Recording Time | Up to 999 hrs 59 min 59 sec | Resolution: 1 second |
| Dimensions | 65 × 35 × 12.5 mm |
| Battery | Not included / not required (powered via USB) |
What's in the Box
- 1× USB Power Meter Voltage & Current Tester
Notes
- Due to lighting and screen variations, the actual product color may differ slightly from images.
- Please allow 1–10 mm variance due to manual measurement.
For more information on USB charging standards and electrical safety, visit the U.S. Consumer Product Safety Commission (CPSC) and the NIST Electrical Measurements resource.
Frequently Asked Questions
Q: What fast-charge protocols does this USB power meter support?
A: This USB power meter supports PD (Power Delivery), QC 2.0, and QC 3.0 fast-charging protocols, as well as other common charging standards, making it compatible with the vast majority of modern smartphones, tablets, laptops, and chargers.
Q: Can this tester measure the resistance of my USB cable?
A: Yes! The tester uses the voltage-drop method to automatically measure USB cable resistance (0–9999.9Ω with 0.0001Ω resolution). This makes it easy to identify cables that may be degrading charging efficiency due to high resistance.
Q: Does this USB power meter require batteries?
A: No batteries are required. The device is powered directly through the USB connection being tested.
Q: How many display interfaces does the tester have?
A: It offers 7 selectable display interfaces, allowing you to customize the readout view to suit your specific monitoring needs — from a simple voltage/current display to comprehensive multi-parameter dashboards.
Q: What is the maximum voltage and current this meter can monitor?
A: The meter monitors voltages from DC 4V to 24V and currents from 0 to 6.5A, supporting power monitoring up to 156W — covering the full range of USB-C PD and QC fast chargers.