I played so well to use the idea of this kind as part of hands-free,
Unfortunately, it is absolutely useless for this function, maybe I'm a rare case for that matter! (WP8.x)
Nevertheless, I would recommend this nice part, that attracts any attention to itself buy again!
Battery performance is far super, once charged, since I have the "August", ind that time, he ran as the 3-4 hours.
and it still makes no effort to be empty!