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Small black USB power meter with LCD screen and .2 inch thickness

Black USB Power Meter 3-9V 0-5A LCD Tester

SKU CH-XMX2-BHMJ7

Compact USB tester measures 3-9V voltage and 0-5A current with a backlit LCD display for real-time power diagnostics

  • Team affiliation1 Piece
  • Key features1, Corded Electric, false
  • Overall height1 L x 1 W x 0.2 H inches
  • Overall width1 L x 1 W x 0.2 H inches
  • Overall length1 L x 1 W x 0.2 H inches
  • Measures 3-9V and 0-5A for precise USB power diagnostics
  • Backlit LCD shows real-time voltage, current and power readings
  • Plug-and-play design needs no setup for instant testing
  • Compact form fits between source and device for quick checks
  • Detects voltage fluctuations and current draw across USB equipment

USB Power Meter for USB Devices

This USB power meter measures voltage from 3 to 9 volts and current from 0 to 5 amps. It connects directly between a USB power source and a device to provide real-time readings. The compact tester suits technicians and hobbyists who need to verify charger output or cable performance.

Practical Limits of USB Testing

The meter operates only within the stated 3 to 9 volt and 0 to 5 amp ranges. It cannot measure voltages below 3 volts or above 9 volts, nor currents exceeding 5 amps. The device requires a USB-A style connection and draws operating power from the circuit under test.

Capacity and Headroom for Diagnostics

The tester comfortably handles standard USB charging ports and power banks within its measurement window. It runs out of range when evaluating high-voltage fast-charging protocols beyond 9 volts or high-current applications above 5 amps. The LCD display shows voltage, current, and calculated power simultaneously.

How it compares

Measured against everything we stock in Multimeters & Electrical Testers, at today’s prices. Recalculated every night.

Price $17.99
Cheaper than about 87% of the 971 comparable items (median $30.99).

Specifications

Product
Brand nameDPWOUM
Size & build
Overall height1 L x 1 W x 0.2 H inches
Overall width1 L x 1 W x 0.2 H inches
Overall length1 L x 1 W x 0.2 H inches
More details
Team affiliation1 Piece

Questions about this item

How do I choose between the 3-9V and 0-5A ranges for my USB device?

The meter measures both simultaneously — voltage from 3 to 9 volts and current from 0 to 5 amps — so you do not select a range; it auto-displays whichever value the connected device draws.

What does the 0-5A reading tell me when the tester is plugged into a laptop port?

It shows the exact current your device pulls in real time, letting you verify charging speed, spot a faulty cable, or confirm the port stays within its 5 amp limit.

Does the USB-A connector limit the 5A capability in practice?

The tester itself is rated to 5 amps, but the actual ceiling will be the lowest of the source, cable and device — standard USB-A ports often stop well below 5 amps.

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