USB Voltage & Current Meter — Battery Capacity Tester for Power Banks & Chargers

USB Voltage & Current Meter — Battery Capacity Tester for Power Banks & Chargers

This USB power meter measures voltage, current, accumulated capacity (mAh), and elapsed time simultaneously, providing a complete picture of USB power delivery performance. It is the essential tool for verifying power bank actual capacity, testing charger output quality, and monitoring USB device power consumption. Simply plug it inline between charger and device — no wiring or setup required.

Key Specifications

Parameter	Value
Voltage Range	4V – 9V DC
Current Range	0A – 3A
Capacity Range	0 – 99,999 mAh
Time Range	0 – 99 hours
Measurement Accuracy	±1%
Display	Digital LCD / LED (multi-parameter)
Memory Function	Yes (retains mAh and time data)
Connection	USB-A inline (male input / female output)

Why Choose This USB Meter?

• ✅ 4-in-1 measurement — voltage, current, capacity (mAh), and time on one display
• ✅ Memory function — accumulated mAh and time retained across power cycles
• ✅ ±1% accuracy — reliable for power bank capacity verification
• ✅ Inline design — no wiring needed, plug between charger and device
• ✅ Up to 3A measurement — covers standard and fast-charge USB outputs

Typical Applications

• Power bank actual capacity measurement and verification
• USB charger output voltage and current testing
• USB device power consumption monitoring
• Solar panel USB output performance testing
• DIY power bank build quality verification
• Battery discharge capacity testing

Package Contents

• 1 × USB Voltage & Current Meter with Battery Capacity Tester

Enjoy free standard shipping on all orders over $199 USD. Orders are processed within 1–2 business days.

Not satisfied? Return any item within 90 days of purchase for a full refund or exchange. Items must be in original condition.

We are committed to quality, reliability, and customer satisfaction. Every product is carefully selected and tested to meet the highest standards.