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Thursday, February 18, 2016

Product review: USB 3.1 Type C to Type A 3.3ft Sync & Charging Cable by Amagoing






My review is for Amagoing Type C to Type A charging cable. I am using this cable with Nexus 6p.

I have been following Benson Leung reviews of Type C cables since November 2015 when I purchased Nexus 6p. Benson has pointed out that many Type-C cables violate the USB 3.1 specification that states that the termination resistor that advertises the maximum available current has been set incorrectly at 10K which advertises 3A of current, the correct value should be 22K which advertises 1.5A of current. Benson works in Chromebook Pixel group and these cables are not safe to use with Pixel.

However, Nexus 6p is self-limiting and does not draw more than 3A of current. In addition many Type A USB chargers are rated at 2.5A and some as high as 3A which are safe to use with this cable. So the "bug" in the non-compliant cables (the bug being that they do not follow the spec) allows me to draw a higher (yet safe) charge for Nexus 6p.

My tests show that this Amagoing Type C to Type A cable is one of these non-compliant cables. Which means it can provides fast charging for Nexus 6p, where as spec compliant cable does not.

Below are results of the tests with compliant and non-compliant cables.

Nexus 6p at with the battery at 17% and 32%. At this level the phone uses rapid charging if it can.
1) Amagoing Type non-compliant cable draws 2620 mA - 2690mA (Using Qualcomm 2.0 charger)
2) By comparison a compliant cable (I am using a Tenswall cable) delivers a maximum 1500A.

I received this cable from Amagoing for testing and review. Bottom line: this cable is NOT USB 3.1 compliant and behaves differently from a USB 3.1 compliant cable provided by Google when I compare their operation at the battery level which performs "rapid charging" if possible. I now seek out these non-compliant cables to get rapid charging especially from my car charger when I use Nexus 6p for navigation. I am not saying that it's safe for all combinations of devices, laptops like the Chromebook Pixel and the Apple Macbook draw more current than a phone, and there may be badly made chargers that lack current limiting and might burn themselves out. However with a quality charger that's rated for 2.5A this cable will provide rapid charging where as a USB 3.1 compliant cable does not.

You can locate this USB 3.1 Type C to Type A on Amazon by following this link

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