Unlike the many facsimiles flooding the market, this seems like the genuine article. It also seems to work perfectly well and, more importantly, safely. The chord could be longer as this would allow my phone to charge whilst being used as a Sat Nav.
I am staggered by how useless Samsung's own website is and how they don't even stock the most basic accessories for my phone (Galaxy S3 mini). Nor do they have info on any outlets (physical entities or on line) that provide them either. And when I say basic accessories, I mean things like mains chargers!