Super Case for going all day

Jadore new smartphones but hate batteries run down too quickly and since I bought my Galaxy S4 last year, I already noticed how the load is not holding up on for a full day. Working mostly to the outside without access to charging points for giving it a boost, it becomes a problem. I know the battery level is deteriorating fairly soon, I naurai more than enough juice until I get home.
Jai searched among many emergency charger models and products that carry enough of energy seem too bulky and those that are portable, thin and elegant appears to be not powerful enough. I finally decided to choose it as the price wasnt so high, that the capacity is sufficient to charge the S4 and a half times more, and as a combination backup battery / case, it is not as bulky adding only a bit of thickness to ALL OPERATING.
Initial impressions are good also. The quality seems to be important, it easy of use and well protects your device. Additional features such as S-View window lets you see the main information of a sudden Wave and its support at the back to watch videos, movies with the greatest comfort. The single point is less satisfactory than the valve does not as firmly closed. This would be the best of the best if there was a magnetic closure. This is the only point even negative if i was extremely happy with létui, especially with the idea that to jai security in case the battery of my phone mabandonne!