Often it is not on the battery

I can not say much, except that he is apparently identical to the original part on the quality of the battery, unfortunately.
After replacing unfortunately I had to find that the battery life of the iPhone 4 - as I have eigebaut the battery - has hardly extended noticeably.
But this I do not want a lack of quality of the battery hold against because I have at the same time also replaced the battery of an iPhone 3GS and there vorfand the same result.

The problem was that the battery life has been reduced for both devices in one day, which I attributed to the age of the batteries.
Well, I learned from an electronics expert that short battery life "older" Smartphones need to be frequently attributed to the operating system, as this demands more and more computing power from your smartphone with every update.

Makes sense, therefore, is not always a bad battery the trigger for small devices running time, especially not when the phone is used.

Mechanical Quality: 5 Stars
Processing: 5 stars
Price / Performance: 5 stars
Battery capacity: can not be evaluated