I ordered the product on Amazon ... the first time I could not charge the battery, the 2nd time my Nikon D5100 has displayed the same after inserting on the screen that this battery can not be eingestzt for this camera. Maybe he works for another camera, but not for the D5100 !!! (Nikon D3100 or Nikon Coolpix P7000) More text on the display of the Nikon D5100: "This battery can not be used, use a suitable battery for this camera."
I do not know whether it is a mistake from the battery again, or if he really can not be used ....
However, I will certainly choose another (manufacturers) ... SCHADE..der price would have been very good !!