I need to test the power on pc ports while using 20gbps external drives. will this support that? if not how high will it go?

Yes, it works. I tested it with a Lexar NM620 512GB M.2 NVMe SSD in an Silverstone MS12 external USB 3.2 Gen 2x2 20Gbps enclousure. Normaly i get 2100MBps read/write speeds. When i use the Power-Z to measure the power consumption i get read speeds about 1600MBps and 2000MBps write speed.

Does this test for faulty/slow (usb 2.0) cables aswell? i need something to verify usb-c cables are 5/10/20/40gbps.

The tester can detect the E-Marker Chip of the cable, which can display its specs info, such as charging speed and data transmission speed. But most USB 2.0 is not equipped with E-Marker Chip, so the tester cannot test it.

Can i use a usb-a adapter to test usb-a ports?

It can support testing USB-A devices using a USB-C to USB-A cable. You can also use a USB-A adapter, but test results may be affected by the adapter.

How to test chargers with attached cable? Is there a male to female adapter included?

Firstly, there is no male to female adaptor included, but you can also test the charger with attached cable. Just put the tester between the load (like your laptops, phones) and the attached USB-C cable. Or simply insert the attached cable into the USB-C Female (Receptacle) of KM003C and connect the tester to an independent power supply. For more tech support info, you can visit: https://www.chargerlab.com/km003c-km002c-technical-support/

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Power-Z KM003C Portable USB-C Fast Charging Tester PD3.2 QC5.0 Digital Voltmeter & Ammeter Power Bank Tester

Power-Z KM003C Portable USB-C Fast Charging Tester PD3.2 QC5.0 Digital Voltmeter & Ammeter Power Bank Tester

Product ID: 492307095

Details

Brand
ChargerLAB
Color
Silver
Item Weight
0.58 Ounces
Power Source
Usb Type-c
Style
Modern

⚡240W max PD power

📊1.54" high-contrast LCD

🔌Dual USB-C ports + HID

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$228.30

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Details

Brand
ChargerLAB
Color
Silver
Item Weight
0.58 Ounces

Description

⚡ Power-Test Like a Pro — Stay Ahead in the Fast-Charging Game!

POWER UP TO 240 W ⚡ - Supports USB PD3.2 & QC5.0 fast charging protocols for ultimate device compatibility and speed.
CRYSTAL CLEAR DISPLAY 📊 - Larger 1.54-inch gravity-rotating LCD with high contrast UI ensures effortless real-time monitoring anywhere.
DUAL USB C PORTS HID 🔌 - Designed for seamless input/output testing and PC connectivity for advanced data analysis and firmware updates.
FUTURE PROOF UPDATABLE 🔄 - Firmware updates via PC software keep you ahead of evolving USB PD standards—never get left behind.
PRO GRADE PRECISION INSIDE 🧠 - ARM Cortex-M4 processor with 20-bit ADC delivers ultra-accurate voltage, current, and protocol diagnostics.

The Power-Z KM003C is a compact, professional-grade USB-C fast charging tester featuring PD3.2 and QC5.0 support, a large 1.54-inch high-contrast LCD, dual USB-C ports plus HID for PC connectivity, and an ARM Cortex-M4 processor with 20-bit ADC. It delivers precise voltage, current, and protocol analysis up to 240W, with firmware updates ensuring compatibility with the latest USB power delivery standards—ideal for tech-savvy professionals and device testers.

Specifications

ASIN	B0BJ24PVNJ
Best Sellers Rank	#19,355 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #18,340 in Cell Phone Accessories
Brand	ChargerLAB
Brand Name	ChargerLAB
Color	Silver
Customer Reviews	4.5 out of 5 stars 222 Reviews
Item Dimensions	1.4 x 0.34 x 1.44 inches
Item Weight	0.58 Ounces
Item dimensions L x W x H	1.4 x 0.34 x 1.44 inches
Manufacturer	ChargerLAB
Measurement Type	Ammeter, Voltmeter, Multimeter
Model	KM003C
Part Number	KM003C
Power Source	Usb Type-c
Specification Met	CE, EMC, FCC, RoHS
Style	Modern
Style Name	Modern
UPC	756166474123

Reviews

A**.

14.03.2024

R**N

30.03.2024

H**K

12.10.2025

R**N

6.03.2026

S**R

27.07.2025

E**P

23.02.2026

M**L

9.12.2024

G**T

10.04.2026

F**E

14.05.2025

A**D

4.09.2025

H**.

21.10.2025

I**T

18.03.2026

J**A

23.12.2024

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