Just sharing

[rahlquist]

Yes this is true, but having two testers (one that has a microusb in) I can test cables.

Power Supply-->New USB Tester-->Cable Under Test-->Usb Tester with MicroUSB in-->any load.

Sure, you can then test cables. But you're also not new to this SBC world and you know already how bad Micro USB used for DC-IN is in reality. The average Pine64 backer that follows the recommendation to buy these cheap powermeters to be attached on the wrong end of the cable will fail to understand how important low resistance is (AWG 20 gauge rating preferred).

A powermeter that can be attached directly to the Micro USB port would be the way better recommendation since this easily shows the real problem: Undervoltage. Both the aforementioned link as well as this old thread might give the idea what might happen if you're using the wrong cable: http://forum.lemaker.org/forum.php?mod=v...a=page%3D1

Unfortunately as voltage sensitive as most SBC are the flip side of it is that most dont understand that almost every "affordable" device that measures current consumption does so by running the input voltage through a resistor of a known value and measuring the drop across it. So to measure current the input voltage is being lowered across a resistor to calculate the current used. If you were to daisy chan several of these meters together you could watch the drop from one to the next.