USB Current Voltage Tester
The USB Current Voltage Tester is a compact and easy-to-use digital meter designed to measure voltage and current of any USB device or charger in real time. Simply plug it inline between your USB power source and device to instantly view live readings on the LCD display. With a measuring range of DC 3V–9V and current up to 3A (supports up to 5A), it's perfect for testing chargers, power banks, cables, and USB-powered electronics for performance and safety.
جهاز قياس التيار والفولتية USB هو جهاز قياس رقمي صغير الحجم وسهل الاستخدام، مصمم لقياس الفولتية والتيار لأي جهاز أو شاحن USB في الوقت الفعلي. ما عليك سوى توصيله بين مصدر الطاقة USB والجهاز لعرض القراءات المباشرة على شاشة LCD فوراً. بمدى قياس 3 إلى 9 فولت وتيار يصل إلى 3 أمبير (يدعم حتى 5 أمبير)، فهو مثالي لاختبار الشواحن وبنوك الطاقة والكابلات والأجهزة المشغلة عبر USB للتحقق من أدائها وسلامتها.
The USB Current Voltage Tester is an essential diagnostic tool for anyone working with USB-powered devices, chargers, power banks, or cables. This compact device plugs directly into any standard USB port and provides real-time readings of both voltage (V) and current (A), allowing you to instantly verify whether your power source is delivering the correct output.
The tester is incredibly simple to operate, with no batteries or external power required, since it draws power directly from the USB port being tested. The clear LED/LCD digital display shows accurate measurements at a glance, making it ideal for quickly diagnosing faulty cables, weak chargers, underperforming power banks, or counterfeit USB accessories.
With a voltage measurement range of DC 3V–9V and a current range of 0–3A (with support up to 5A in short bursts), this tester covers most common USB charging scenarios, including standard 5V devices and Quick Charge–compatible sources. Accuracy is excellent within the rated range, with an error margin of just ±1% at currents up to 3A.
Whether you're a technician, electronics hobbyist, repair shop owner, or everyday user wanting to make sure your phone is charging at full speed, this tester gives you the information you need quickly and reliably.
Specifications
- Product Type: USB Current and Voltage Tester
- Condition: Brand New
- Voltage Measuring Range: DC 3V – 9V
- Current Measuring Range: 0 – 3A (supports up to 5A maximum)
- Accuracy: ±1% (within 3A range)
- High-Current Note: At currents above 3A, error margin exceeds 3%
- Display: Digital LED / LCD readout
- Power Source: Self-powered through USB port (no batteries required)
- Connector: Standard USB-A male input / USB-A female output
- Housing Material: Durable plastic enclosure
- Operating Temperature: Standard indoor environment
Note: Color may vary slightly from the photos due to lighting, monitor brightness, and contrast settings.
Applications
- Testing USB chargers and wall adapters to verify correct voltage and current output
- Evaluating power bank performance and checking actual charging output vs. advertised specs
- Diagnosing faulty or low-quality USB cables that cause slow charging
- Verifying smartphone and tablet charging speed in real time
- Quality control for electronics workshops, repair shops, and resellers
- Identifying counterfeit chargers and cables that fail to deliver rated power
- Educational use in electronics labs, classes, and DIY projects
- Monitoring USB-powered devices such as fans, LED lights, and small gadgets
- Comparing charger performance between different brands and models
- Field troubleshooting for technicians servicing USB-powered equipment
- Hobbyist and maker projects involving USB power delivery
- Battery and charging diagnostics for mobile phones, tablets, and IoT devices