Replaces original battery but ...

This battery replaces the original battery.
With my use (3 hours of mp3, 1/2 hour of 3G browsing, ten sms
1/2 hour Wi sailing 45 minutes, email reading), 100% phone at 6 am, I still have 20% battery to 22 hours.

Update September 2014

Finally I recommend this battery because after 4 months of use autonomy has fallen sharply.
By reducing the use of the phone I still have almost every day 10% battery to 15 hours!
I'll try an external battery (3000mAh POWER RAV) to recharge it before you buy me a phone, not necessarily with a removable battery, because it is apparently very difficult to find
a valid replacement battery.
I therefore withdraw 2 star product.
Flee!