ALIENTEK USB Tester C2 Features Specifications and Fast Charge Detection
The ALIENTEK USB Tester C2 measures voltage, current, power, capacity, and energy simultaneously, giving you a complete picture of any USB charging session on a single high-resolution screen. PD3.2 fast charge detection identifies the active charging protocol in real time, so you instantly know whether a charger is delivering the full rated power to your device. The multi-protocol trigger function supports PD, QC, and other major fast-charge standards, letting you manually activate specific voltage outputs for bench testing and circuit validation. A built-in battery capacity tester tracks total charge delivered in mAh and mWh, which makes it straightforward to verify battery health or charger consistency over multiple cycles. Compact USB-A and USB-C pass-through connectors keep the tester inline without interrupting normal device operation, making it a trusted tool for electronics engineers, makers, and hobbyists alike.
AliExpress Shopper –
All good, but need time for all functions check. packaging is premium, also.
AliExpress Shopper –
I’m satisfied with the delivery, thank you!
O***v –
A very cool tester! Unlike the Fnirsi C2 (which was most likely made as its competitor), it tests protocols much faster and often detects more protocols. In photo 3, there is a screenshot of protocols from the Alientek C2, and in photo 4, a screenshot of protocols from the Fnirsi C2. The color scheme is easier to read, and the menu is simple and clear.
AliExpress Shopper –
Technically, the Alientek C2 Pro is a real surprise and very close to the KM003C. It handles the PD 3.1 / 28V EPR handshake absolutely cleanly and reads protocols in a similarly detailed manner as the market leader. The casing is absolutely equally well-made, and the supercapacitor (the display stays on briefly when plugged in) is a brilliant feature.
Software & Support:
Installation: The PC software and app primarily launch in Chinese. This is tedious, but fairly speaking: the KM003C has exactly the same problem with every update.
App bug: The Android app is a great advantage, but unfortunately it forgets the language setting every time it restarts.
Support: The manufacturer responded intelligently in the chat and promised to have the engineers optimize the language issues in the app and PC software for international customers.
Conclusion: First-class PD analysis at a fraction of the price. Those who overlook the software glitches get professional-grade hardware.
A***o –
Good packaging, includes a protective glass. The tester is worth the money.