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J7C USB Power Tester:




This is one of the "cross" shaped testers that can be powered by USB-A, USB-C, or USB-micro, and connects to
peripherals over USB-A or USB-C. It's a newer version of my older tester that has USB-micro instead of USB-C.
The color display has MANY different modes, and can count up Ah, Wh, and time.

Single-click the button to change display screen. Hold button to flip orientation. Double, triple, or quadruple-
click the button to clear watt-hours, amp-hours, or time. Hold button at power-on to adjust ranges.

Somehow I ended up with two of these. Pretty useful, although can be hard to read if you need to power it from
a USB port that's not in a convenient place. Also there are a few places it can't be plugged in due to having
access blocked by the shoulder of the device body.



J7-C_Detailed_User_Manual(in_English_French).pdf


J7C USB Power Tester (listings on eBay)


J7C USB Power Tester:



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last updated 05/20/2025 at 19:11:20 by make_www_index.command version 2025.05.20.B