USB Voltage Ammeter Power Capacity Tester KWS-V21
Accurate real-time monitoring of voltage (0-30V) and current (0-5A) with 0.01V/0.001A high precision for reliable power diagnostics. Durable ABS shell with flame-retardant coating and reinforced ports ensures long-term stability under heavy-duty use. Clear OLED screen displays voltage, current, power, capacity, and energy consumption simultaneously for instant data analysis. Wide compatibility—tests power banks, batteries, solar panels, car chargers, and DIY electronics with universal micro USB input. Compact and lightweight (45g) with anti-slip grooves for easy portability in workshops, labs, or fieldwork. Built-in automatic power-off and overload protection to safeguard devices and prevent energy waste. Ideal for engineers, hobbyists, and quality control teams optimizing power efficiency in gadgets and renewable energy systems.