USB with only two leads?
Sadly, this seems to be common: USB cables that carry only power. To my knowledge that is not according to any USB spec. And it is quite frustrating because such a cable has no marking to distinguish it from a regular USB cable, so after connecting a device to my computer it takes me a lot of time to figure out that it is the &amp;^%&amp;&amp;%$% cable. Needless to say, they end up in the trash can.