What can one say to a original second battery already? I do not think so much. Quality B corresponds to the battery to have most readers of the review already in her camera. I come each battery to approximately 800 images. Of course does not meet the laboratory values of Nikon and sinks by using the image stabilizer my 150-500er Sigma Teles course. All in all one can complain about, which is why there are only 4 stars from me only about the price. I think a price of max. 50 euros would many buyers to put a smile on your face.