With this I am still fully satisfied even after two months of use. After a couple of boots he surpasses loose the original power of the original Extended Battery. What percentage exactly he is better, I have not measured, it is noticeable but definitely. Now I'm at moderate use also times two days with a single battery charge ends meet. The old, declining Extended Battery had the evening usually only 10 percent or less left.
The whole course paid for one with a slightly higher weight and a - shall we say - getting used to style. However, I am a charged smartphone is on the way more important than a pretty, in which the battery is empty. And since currently higher battery capacity needs to be bought by a larger battery, which is a compromise that you have to make up.
Tip: I think the Galaxy Nexus without shell not very handy. Therefore I bought originally a mumbi TPU silicone sleeve, the course will no longer fit on the battery battery-King. This I have simply cut with a utility knife that the battery back "look out of" - so just cut a large, matching hole in the back of the case. Now does not look super professional, but does the job and the Galaxy Nexus remains tacky feel.