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Compact rectangular USB-A power meter with LCD screen and integrated plug

Klein Tools ET910 USB Power Meter electrical system tool

SKU CH-FG42-NEYEZ

Measures USB-A voltage, current, capacity, energy and resistance with built-in 0.5A, 1A, 2A and 3A test loads for up to 1000 hours

  • FeaturesUSB Power Meter, Usb-powered, false
  • Height11.21 L x 2.13 W x 0.98 H inches
  • Width11.21 L x 2.13 W x 0.98 H inches
  • Length11.21 L x 2.13 W x 0.98 H inches
  • Weight2.8 ounces
  • Sports Team1 Piece
  • Measures voltage, current, capacity, energy and resistance simultaneously
  • Built-in test loads of .5, 1, 2 and 3A eliminate external load
  • Monitors continuously for up to 1000 hours
  • Stores and recalls up to 10 readings for later review
  • Hi-resolution LCD remains clear in low ambient lighting

USB-A port tester for technicians

The Klein Tools ET910 is a USB digital meter and tester combination for most common USB-A ports, including Qualcomm Quick Charge ports. It measures and displays voltage, current, capacity, energy, and resistance simultaneously. Professionals use it to verify port output and diagnose charging issues in the field.

Sustained monitoring up to 1000 hours

The meter continuously monitors voltage, current, capacity, energy, and calculated resistance for up to 1000 hours. Built-in fixed test loads of 0.5A, 1A, 2A, and 3A let you stress a port without an external load. Overload detection protects the instrument during extended test sessions.

Replaces separate meters and external loads

This single tool replaces a standalone voltmeter, ammeter, and the external load resistors normally required for USB-A port qualification. The jump is worth it when you need to store and recall up to 10 readings without carrying extra accessories. It does not serve buyers who need USB-C or Power Delivery measurements.

Highlights

  • Measures voltage, current, capacity, energy and resistance simultaneously
  • Built-in test loads of .5, 1, 2 and 3A eliminate external load
  • Monitors continuously for up to 1000 hours
  • Stores and recalls up to 10 readings for later review
  • Hi-resolution LCD remains clear in low ambient lighting

Specifications

BrandKLEIN TOOLS, Klein Tools
FeaturesUSB Power Meter, Usb-powered, false
Height11.21 L x 2.13 W x 0.98 H inches
Width11.21 L x 2.13 W x 0.98 H inches
Length11.21 L x 2.13 W x 0.98 H inches
Weight2.8 ounces
Sports Team1 Piece
TypeAmp Meters & Probes

Questions about this item

Does the ET910 generate noticeable heat when monitoring a 3 A load for hours?

The meter draws power from the USB port under test and has no internal fan; its compact 2.8 oz body stays cool during extended 1000-hour logging sessions.

What must I already have to use the ET910 right out of the box?

A standard USB-A port supplying 3–20 V DC at up to 3 A — the built-in 0.5 A, 1 A, 2 A and 3 A test loads mean no external resistor or power supply is needed.

Will the ET910 work with the older USB-A chargers I still keep in my toolbox?

Yes — it tests most common USB-A ports, including Qualcomm Quick Charge models, and measures voltage, current, capacity, energy and resistance on each.

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