USB Voltage & Current Meter – Battery Capacity Tester & Power Bank Charger Monitor

Monitor USB charging performance with this USB Voltage & Current Meter, a compact plug-and-play tester designed to measure voltage, current, and charging capacity. It provides a convenient way to check USB ports, charging cables, power banks, and other compatible USB-powered equipment.

With its easy-to-read digital display and compact design, it's useful for personal electronics testing, DIY projects, workshops, and laboratory applications.

Key Features

• Real-Time Digital Display — Clearly shows measured electrical data.

• Voltage & Current Testing — Measures USB voltage and operating current to help evaluate charging performance.

• Capacity Monitoring — Tracks charge and discharge capacity over time.

• Charging Cable Testing — Helps identify potential performance differences between charging cables and USB power sources.

• Plug & Play — Simply connect the tester between the USB power source and compatible device; no additional power supply is required.

• Compact & Portable — Small enough to carry in a toolbox, electronics kit, or travel bag.

• Versatile Applications — Suitable for PC USB ports, phone chargers, car chargers, power banks, and other compatible USB equipment.

• Easy to Use — Designed for straightforward testing without complicated setup.

Specifications

• Model: KWS-V20

• Product Type: USB Voltage & Current Meter

• Voltage Range: 4–20V ±1%

• Current Range: 0–3A ±1%

• Time Measurement: 0–99 hours

• Accuracy: ±1%

• Display: Digital

• Material: Plastic

• Color: Blue

• Dimensions: Approximately 59 × 23 × 13.5 mm

• Power: Draws power directly from the USB connection

• Operation: Plug & Play

What Can It Test?

This USB tester can be used with compatible:

• 📱 Phone Chargers

• 🔋 Power Banks

• 🚗 Car Chargers

• 💻 Computer USB Ports

• 🔌 USB Charging Cables

• ⚡ Other Compatible USB Devices

Perfect For

Whether you're troubleshooting charging problems, checking a power bank, testing a charging cable, or working on an electronics project, this compact meter provides useful information at a glance.

Check voltage. Monitor current. Test charging performance with ease.