The "little black dress" is indeed a little cheaper, but also has major drawbacks. Falls on no one who does not know the example red version. The plastic is very cheap, the back shines like a Affena ..... and sure looks after a short time worse than the Iphone cover. Also, the fit (connection of the two parts) is inconclusive. Rather spend a few euros more and (even though it looks terrible) buy red or blue from the same manufacturer. This plastic appears thicker and above all this is as anti-slip coating. Even better protection! Battery OK!
