Friday, May 13, 2016

Are USB-A to USB-C cables fully reversible?

So, I bought a couple of USB-A to USB-C cables when I first bought my 5X so I could use my old wall plugs and car chargers. They charge more slowly than the stock charger, but they generally work. I have both Benson Leung-approved cables and out of spec cables that I bought before I knew to look, but I generally try to use the spec-compliant cables.

Recently, I've noticed something weird - when charging using a USB-A to USB-C cable, my phone sometimes fails to take a charge; it initially detects the power source, and the battery icon at the top of the phone shows a power source, but the battery continues to drain. To fix this, I just have to flip the USB-C end that is plugged into my phone and the phone begins to charge properly. I've seen this happen with at least two different cables and two different wall plugs. I have not noticed this issue when using the stock USB-C to USB-C charger. Is this potentially a hardware issue with my phone, or is it an expected property of using a USB-A to USB-C cable (i.e. these cables are not fully reversible)?


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