USB Digital Meter and Tester, USB-A (Type A)

The Klein Tools ET910 plugs into a USB-A port and reads voltage, current, and charge delivered in real time, with built-in test loads so no separate load device is needed.

• Range: 3 to 20V DC; 0.05 to 3A current (monitoring mode)
• Built-in test loads: 0.5A, 1A, 2A, 3A
• Monitors: voltage, current, capacity/charge delivered, energy, and calculated resistance continuously for up to 1000 hours
• Memory: stores and recalls up to 10 readings
• Display: hi-resolution LCD for low-light conditions
• Drop tested to 6.6 feet (2 m); no batteries needed, powered by the port under test

Best for: technicians verifying whether a USB-A port, including Qualcomm Quick Charge® ports, is actually delivering the voltage and current it claims.

Does it need batteries? No, it draws power from the USB port being tested.