It is the worst battery I have ever used! I have asked for replacement but I still have the same problems with the new one too, which makes me appreciate my old battery!
I knew it looks 100% like the original but it does not work as the original one (it is just rubbish)!
The old one (until this moment) works for 14-18 hours but the average hours of the new one is only around 4-6 hours (NO gamming, NO browsing or navigation, just receiving emails and making just 3-5 short calls).
In addition, the biggest issue about this battery is when it reaches around 40%-38%, it runs out and loses the power immediately, so without any warning message goes from 40% to zero and turns off my device!
I hate this one! I was testing it for many days before contact the company again, which advised me to run flat and re-charge it for over the nigh and repeat it for two days, but it did not work. I have replaced it but the new one has the same issue! It seems that may occur as a result of a manufacturers defect or poor storage of the battery, because as it is written on it, this one just made on 22 July 2011 (It is new) how this could happen to me!
I should admit that the company itself has a good service as they have shipped it quickly, and also replaced it quickly too without any roblem. I respect what they have done here but I cannot say the same about the item itself.
In brief, I give up now, and I will stick with my old battery and I will keep this one just for emergency calls, although it is unreliable!
Sorry, I cannot recommend it at all!