A compact USB power meter that reports voltage, current, capacity and other charging metrics for fast diagnostics, the YOJOCK USB C Tester helps verify chargers, cables and power banks. Clear, colour interfaces make it simple to trust charging behaviour and spot faults quickly. Is accuracy and convenience reliable enough for regular troubleshooting?
⚡ At a Glance
- • Measurement Range: Voltage 3.6–32V, current 0–5.1A; records capacity, power and more
- • Best for: Technicians, enthusiasts and travellers who check chargers and power banks
- • Not ideal for: Users who need integrated audio or hands-free features
Portable USB-C power meter with an 8-colour IPS display and multi-protocol compatibility. Measures voltage, current, capacity, power and other charging parameters while including built-in safety cut-offs.
Accurate diagnostics - With a wide measurement range and multi-metric readout
Measures voltage from 3.6V to 32V and current up to 5.1A, while logging capacity, power, resistance, temperature and charging time. Multiple parameters are sampled continually so trends and peaks can be observed during tests.
Allows precise checks of chargers and cables so faults can be identified before damage occurs. Useful for verifying whether a charger meets advertised output under real load.
Instant, easy-to-read results - With an upgraded IPS colour display
Eight IPS main colour screen interfaces let users switch display modes and view larger fonts in one mode for better legibility. Colour-coded, organised readouts help scan multiple metrics at a glance.
Reduces time spent deciphering small values and speeds up troubleshooting in dim or busy environments. Ideal for bench work or quick checks on the move.
Safer testing for connected kit - Thanks to built-in protection and automatic cut-off
Over-voltage, over-current, under-voltage and low-energy protections will cut output automatically when anomalies are detected, while saved data remains retrievable after sudden power loss. The tool supports common fast-charging protocols to negotiate appropriate voltages.
Gives reassurance when testing chargers and power banks, helping to prevent accidental damage to phones or laptops. Particularly valuable when validating unfamiliar or second-hand chargers.
✨ The 4 Key Reasons for YOJOCK USB C Tester
- 8-colour IPS display - Read voltage, current and power at a glance, faster troubleshooting.
- PD/QC protocol support - Detects fast-charging profiles for modern USB-C chargers and phones.
- Built-in safety protections - Automatic cut-off protects appliances from over-voltage or current spikes.
- Power bank capacity testing - Calculates discharged mAh using voltage-specific multipliers for accuracy.
📋 Technical Details at a Glance
- Category: USB power meter
- Display: 8 IPS main colour screen interfaces, larger-font mode available
- Measurement Range: Voltage 3.6V–32V
- Current Range: 0–5.1A
- Measured Parameters: Voltage, current, capacity, electric quantity, power, temperature, resistance, charging time, load impedance
❓ Frequently Asked Questions
Q: Can the meter test power bank capacity?
A: Yes. Fully charge the power bank, insert the USB voltage tester and double-click to clear previous data, then connect a load or mobile phone for continuous discharge, ensuring the discharge voltage is 5V or 9V; apply the specified multipliers for corrected mAh.
Q: Which fast-charging protocols are supported?
A: PD3.0 and PD2.0, QC3.0 and QC2.0, plus BC1.2 are supported, and the unit works over USB-A and USB-C connections with the included OTG adapter.
Q: What voltage and current ranges can it measure?
A: Voltage measurement spans 3.6V to 32V and current measurement covers 0 to 5.1A, with additional readouts for power, capacity and related metrics.
🏆 Our Verdict
Suited to technicians, hobbyists and travellers who need compact, reliable charging diagnostics. The combination of an 8-colour IPS screen, multi-protocol support and comprehensive safety cut-offs makes accuracy and safety the main selling points. While cost may be above the most basic testers, the diagnostic depth and long-term reassurance deliver solid value for regular users.
