Anyway, after I learned about forums dedicated to Galaxy S2, I decided to buy this battery pack, motivated by the greater capacity. Indeed, much better battery life than the holding of origin of Samsung. Everything depends on the use and this varies from user to user, but for my part, I passed a battery life of 12h-14h to 18h-24h. From this point of view, I am completely satisfied with the product.
The supplied charger is less satisfactory. It is really low quality plastic with a hinged portion at the outlet that does not inspire confidence in duration over the long term. It would be better not to include it in the pack, even without changing the price! In fact, I've only used it twice for the initial loading of the batteries; since I just classical micro-USB charger.
