Efficient but imposing.

You have to see over the term, but after a few days of use, I am very satisfied with the holding of the battery. I, who uses much my rating, I can spend a whole day without recharging, which was not the case before.
The shell is not so bad quality that what I was reading. She just touched a different, closer to the plastics used by HTC by Samsung. By cons, it is really not easy to implement, and I even broke a bracket by putting the first time. What is not seen nor gene.
The where there may be a real problem for some: the smartphone easily takes 1cm thick. Some will be embarrassed, not me specially, I find it even improves grip for writing. But this is actually what to consider before purchasing this product.