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USB Current & Voltage Tester — Battery Capacity & Time Display, 4–9V, 0–3.3A, Power Bank Meter

USB Current & Voltage Tester Battery Capacity & Time Display, 4–9V, 0–3.3A, Power Bank Meter

$11.88 USD

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USB Current & Voltage Tester — Battery Capacity & Time Display

This USB power meter measures voltage, current, accumulated battery capacity (mAh), and working time simultaneously, displaying all four parameters on a clear digital screen. It is the essential tool for testing USB charger output quality, measuring power bank capacity, and monitoring USB device power consumption. With ±1% measurement accuracy and a memory function that retains capacity and time data between sessions, it provides reliable data for DIY electronics and battery testing.

Key Specifications

Parameter	Value
Voltage Range	4V – 9V
Current Range	0A – 3.3A
Input Voltage	3.5V – 9V
Capacity Range	0 – 99,999 mAh
Time Range	0 – 99 hours
Measurement Accuracy	±1%
Memory Function	Yes (retains capacity + time data)
Dimensions	68 × 23 × 12mm

Why Choose This USB Tester?

✅ 4-in-1 display — voltage, current, capacity (mAh), and time on one screen
✅ Memory function — accumulated mAh and time retained across power cycles
✅ ±1% accuracy — reliable measurements for battery capacity verification
✅ Up to 3.3A measurement — covers fast-charge USB outputs (5V/3A)
✅ Compact inline design — plugs between charger and device, no wiring needed