With a coupon from 60 €! This USB-C charging tester is also used by a well-known Czech YouTuber: A top-notch tool for every tech enthusiast

If you’re among tech geeks or you simply love testing the performance of chargers, cables, and devices, then the Power-Z KM003C USB-C tester should be in your gear. This handy little gadget will surprise you with its features, accuracy, and performance—and it’s even used by the well-known Youtuber Geekboy. It can analyze various fast-charging protocols, measure voltage, current, and power, and even offers a data recording option. Thanks to its large color display and a wide range of diagnostic modes, this tester is an ideal tool not only for home enthusiasts, but also for professionals in electronics and IT.

With a coupon on AliExpress!

You can find the Power-Z KM003C tester on AliExpress from a verified seller. Even though it ships from a Chinese warehouse, delivery is very fast — already within 15 days — and with no extra fees! Don’t forget to use the coupon from the price box too.

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Power-Z KM003C USB-C tester

15-day delivery

15-day delivery

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73,55 €You save 16,12 €

57,43 €

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Updated 18. 9. 2025 at 06:29

TIP15-day delivery via Aliexpress Standard Shipping

For this product, Aliexpress Standard Shipping is available with guaranteed delivery within 15 days. It’s the most reliable delivery method and, in most cases, it’s handled by a courier company. The 15-day delivery is something we actually tested.

When you order from a Chinese warehouse, AliExpress adds a customs duty charge of approximately 3,70 € per order to your cart. When you receive the shipment, you won’t have to pay anything extra.

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The process is via the AliExpress mobile app, where most people shop. There are two key things: don’t use Buy now and enter the coupon only in the order summary, in the field Promo code. After you click Pay now, you won’t be able to add it.

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Support for the latest protocols and high voltage up to 50 V

One of the biggest advantages of the Power-Z KM003C tester is its support for modern fast charging up to the level of USB PD3.1 with a maximum output of 48 V and 240 W. It can display a complete list of supported protocols such as QC4, QC5, SCP, FCP, AFC, PPS, VOOC, SVOOC, UFCS, and many more. That means you can use it to test practically any modern device, power bank, or charger.

The device includes a 20-bit ADC converter and an ARM Cortex-M4 192 MHz processor, which provides high processing speed. The device can display data with an accuracy of up to 0.00002 V for voltage and 0.00003 A for current. The voltage range goes up to 50 V and the current up to 6 A, making it suitable for professional use as well.

Color high-resolution display and rich graphs

A big advantage is the 1.54″ color IPS display with a resolution of 240 x 240 pixels. It shows all the important parameters such as voltage, current, power, and also the charging protocol that is currently active. Plus, you can switch between different screen refresh modes: 4sps / 15sps / 60sps / 1Ksps—depending on whether you prefer detailed monitoring or power saving.

The Power-Z tester can record and display the voltage and current readings, including details like CC1/CC2 and D+/D- in real time. If needed, it allows offline data recording thanks to 4 MB of internal memory, and later you can export these data using a PC application.

Offline recording, cable diagnostics, and PC software support

The tester can read E-marker chips in USB-C cables and shows you what power and data transfer speed that cable supports. Of course, it also supports reading the SN of original Apple adapters—something you’ll appreciate especially when checking the authenticity of accessories.

On your computer, you can use PC software (compatible with Windows 10 and 11) to monitor charging protocols, update the firmware, export records, and at the same time connect multiple testers at once — basically without limits on the number. It’s a dream come true for advanced technicians!

Technical specifications of the Power-Z KM003C

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