Installation:
After a manual on youtube, I have successfully installed the battery. Everything has been recognized - so far perfect.
Commissioning:
My old battery is just over two years old. The new battery but managed still to bring less power! Resetting to factory settings also brought no improvement.
Conclusion:
Considering the fact that one is pretty much on the exchange's game, these "new" goods is an absolute impudence. Even if one converts my battery, I must again take the risk that then nothing works.
Edit 21/02/2013
I have now a new phone - the old one was no longer usable. My first battery lasted at the end to about 20%, then the phone clicked off. The "new" or acquired here began at 36%, and is now at 100%. Yes - the mobile phone turns now at 100% of battery, which means a use of more than 5 minutes is impossible. Software default times I've been playing at least 3-5 new everything, to no avail. As an explanation: According to statements in forums not create old batteries high performance sometime, whereby the phone then switches off. This was evident to me also by the fact that after going out of the phone while I was able to start up again but the battery did not make it back to the iOS in 90% of cases. Considering this fact, I think even the one star for too much.