I have a galaxy s2 for over 2 years and I am satisfied. Finding that he really held the load (hardly the day with juice defender), I wanted to replace the battery. I then bought a Samsung battery on Amazon. I received it very quickly. It was my disappointment when I found that I wanted even less the charge with this new battery :(
So I decided to buy this battery Anker. I am satisfied :). I found a 'normal' autonomy (3/4 j with Jewish defender and a very low usage!). The Anker customer service is also very attentive to client satisfaction, ready to send us a new product if received is not up to the expectations!