First, it is an original Samsung battery (1650mAh difficult to find the original battery, I bought one on amazon and it was a Chinese who was walking very badly). Nice surprise with this 2000mAh battery: it is barely thicker than the former. With the hull livery hardly see the difference, I think we had better hand. My silicone case fits perfectly (I have another more rigid that does not fit). Performance-wise, it's much better: my S2 regains little autonomy. It is not huge but the S2 is quite greedy and quite warm whatever the battery. In short, a good product that I recommend (attention, it seems that the shell does not fit on some version of s2).
