Best USB Multitester: How to Choose One

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A USB multitester sits between a charger or power bank and the cable, and shows readings such as voltage and current on its screen. It suits charger checks, power bank tests and small electronics projects. The six testers below all plug into USB, but they quote different limits, so the right one depends on the voltage and current your charger can deliver.

Quick answer

If your charger is a USB-C PD unit and you want a higher ceiling, the FNIRSI FNB58 is titled for 28V and 7A with a USB-C e-marker reader. The YEREADW and YOJOCK both state 4-30V and 0-12A, and the YOJOCK adds a 360W title. For a plain USB-A and USB-C meter that also reads energy and resistance, look at the Klein Tools ET920. The Eversame and MakerHawk titles do not state a voltage or current range, so confirm theirs on the product page.

Comparison table

Product	Key facts from the title	Power source field	Weight
Eversame 2 in 1 Type C tester	Color LCD screen, voltage and current; range not stated	Electric	1.1 ounces
FNIRSI FNB58	PD/QC, USB-C e-marker reader, 28V 7A, USB-A/C	Battery Powered	1.6 ounces
YEREADW USB C tester	4-30V, 0-12A, Type-C PD, power bank capacity	Usb, Type-c	Not stated
YOJOCK 360W tester	360W, 4-30V, 0-12A, Type-C PD, power bank capacity	Usb, Type-c	0.04 kg
Klein Tools ET920	USB-A and USB-C; voltage, current, capacity, energy, resistance	Usb-port Powered	1.76 ounces
MakerHawk USB multimeter	Voltmeter, ammeter, load tester, PD, capacity, LCD	Corded Electric	18 g

Product reviews

Eversame 2 in 1 Type C USB Tester

What it is: A Type C USB tester with a color LCD screen that reads voltage and current. The listing fields give Power Source: Electric, Style: Voltage Tester, Color: Black and a weight of 1.1 ounces.

Who it suits: Someone who wants a small Type C tester for checking a cable or charger and is willing to confirm the supported range before buying.

• Pros: Color screen named in the title; lists both voltage and current; 1.1 ounces is the lightest weight in the shortlist apart from the MakerHawk.
• Cons: No voltage or current range is stated in the fields shown; no dimensions given.

Skip if: You need to be sure it handles a high-wattage PD charger, since the range is not stated.

Eversame USB-C tester on Amazon (affiliate link)

FNIRSI FNB58 USB Tester

What it is: A USB tester titled for PD and QC, with a USB-C e-marker reader, 28V 7A and USB-A/C ports. The fields list Battery Powered, Style FNB58, Color multi-color and a weight of 1.6 ounces.

Who it suits: Buyers who test fast chargers or want to read the e-marker chip in a USB-C cable.

• Pros: The title gives a clear 28V 7A ceiling; PD, QC and e-marker reading are named; covers USB-A and USB-C.
• Cons: The style field is only the model name, so the full function list must come from the product page; no dimensions given.

Skip if: Your charger can output more than 28V or 7A, because that is beyond the title limits.

FNIRSI FNB58 on Amazon (affiliate link)

YEREADW USB C Tester Power Meter

What it is: A Type-C PD tester titled 4-30V and 0-12A that reads voltage, current and power bank capacity. The fields give Power Source: Usb, Type-c, Style: Type-C Tester, Color: Silver-Grey and Measurement Type: Multimeter.

Who it suits: Someone who wants a wide current range, up to 12A, for charger and cable checks.

• Pros: Voltage and current ranges are in the title; power bank capacity reading is named.
• Cons: No weight or dimensions are quoted.

Skip if: You need a size or weight figure before you order, or you want USB-A support, which is not mentioned.

YEREADW tester on Amazon (affiliate link)

YOJOCK 360W USB C Tester Power Meter

What it is: A Type-C PD tester with a 360W title and the same 4-30V and 0-12A range as the YEREADW, plus power bank capacity. The fields list Usb, Type-c power, Style Type C, Color Grey-blue and a weight of 0.04 kg.

Who it suits: Buyers who want a quoted wattage figure alongside the voltage and current range.

• Pros: Wattage, voltage and current limits all appear in the title; weight is quoted.
• Cons: No dimensions given, so check the plug layout and size on the product page.

Skip if: You need dimensions to fit a tight spot.

YOJOCK 360W tester on Amazon (affiliate link)

Klein Tools ET920 USB Power Meter

What it is: A USB power meter for USB-A and USB-C that shows voltage, current, capacity, energy and resistance. The fields list Usb-port Powered, Style USB-A and USB-C Meter, Color Orange and a weight of 1.76 ounces.

Who it suits: Someone who wants energy and resistance readings in addition to voltage and current, and uses both USB-A and USB-C ports.

• Pros: Covers both port types; reads energy and resistance as well; powered from the USB port, so no separate supply is stated.
• Cons: No voltage range appears in the fields shown; no dimensions given.

Skip if: You need a stated maximum voltage or current from the listing itself.

Klein Tools ET920 on Amazon (affiliate link)

MakerHawk USB Multimeter

What it is: A USB multimeter titled as a voltmeter, ammeter and load tester for USB voltage and current, PD battery power and capacity, with an LCD display. The fields give Corded Electric, Style Voltage Tester, Color Light black and a weight of 18 g.

Who it suits: Buyers who want a light unit, 18 g, with load testing named in the title.

• Pros: Lowest quoted weight in the group; load tester and capacity reading are named.
• Cons: No voltage limit is quoted in the fields shown; the corded power entry needs a check on the product page.

Skip if: You need a stated voltage ceiling.

MakerHawk USB multimeter on Amazon (affiliate link)

Buying checklist

• Write down the highest voltage and current your charger or power bank can output, then keep only testers whose stated range goes above both.
• Check the port type: the Klein ET920 names USB-A and USB-C, the FNIRSI FNB58 names USB-A/C, and the YEREADW and YOJOCK are titled as Type-C testers.
• Decide whether you need extras such as capacity, energy or resistance readings, or e-marker reading for USB-C cables.
• Compare weight with weight. Only five of the six listings quote a weight and none quotes dimensions in the fields shown.
• Where a range is not stated, confirm it on the product page for the exact variant before ordering.

FAQ

Which of these testers states the highest current range?

The YEREADW and YOJOCK titles both state 0-12A with 4-30V. The FNIRSI FNB58 title states 28V and 7A. The Eversame, Klein Tools and MakerHawk titles do not give a current range in the fields shown.

Which ones read power bank capacity?

The YEREADW and YOJOCK titles name power bank capacity, the Klein Tools ET920 title names capacity, and the MakerHawk title names capacity as well. The Eversame and FNIRSI titles do not mention it.

Do I need a tester with an e-marker reader?

Only if you want to read the e-marker chip in a USB-C cable. Among these six, only the FNIRSI FNB58 names a USB-C e-marker reader in its title.

Which is the lightest?

The MakerHawk lists 18 g, the YOJOCK lists 0.04 kg, the Eversame lists 1.1 ounces, the FNIRSI lists 1.6 ounces and the Klein ET920 lists 1.76 ounces. The YEREADW does not quote a weight.

Can a USB tester replace a regular multimeter?

No. These testers read what flows through a USB connection. For general electrical work you need a multimeter with the right range and measurement category, and mains work should be left to a licensed electrician.

Closing note

Match the stated voltage and current limits to your charger first, then choose on port type, extra readings and weight. If you are also comparing other brands, see Best Atorch Usb Tester and Best Keweisi Usb Tester. For a different job, Best Usb Outlet Tester covers outlet testing.