Stops just short what it promises

Unfortunately, he holds this power not very long!
The first 2-3 months everything was fine. But now fails the battery ever earlier. The bad part is that he is not completely compatible with the battery indicator of the notebook. Show me this 54% of, the notebook also adopted already, without warning, due to lack of power supply. That's less than half the original power!

The performance is so much worse than the original batteries after half a year!

What in me was come is that the battery also seen mechanically not komatibel with the R522. He snaps on only one side of the bracket. By the oblique position of the notebook, which is due to the more capacity, it could happen then that the battery is shifted too far, the notebook - logically - crashes immediately.
On the mount of the notebook, it can not be because of the wonderful original battery snaps into place and is not a millimeter shifted. This issue alone to read it dissolve well with some residue-free adhesive tape.

Whoever occasionally needs a powerful battery and is willing to compromise, is here at the right address.
All others I would recommend again to look elsewhere!