As long as your tv supports mhl 2

0 or higher you will be able to power your smartphone directly from the hdmi cable which is incredibly handy if you are running your phone as a video source from netflix or something downloaded on your phone

Most other adapters (official or not) require you to have a weighty adapter close to your phone and stress both your jack and the connector making for a very awkward transaction requiring a long micro usb to make it useful at all