The battery is functioning properly in our Professional Care 9500, but the installation of the batteries is something hakelig. On YouTube there are several instructions for removing and re-inserting the battery of Oral B toothbrushes. In our toothbrush 4 different locations had to be disposed of or re-soldered. The reason for the purchase was mainly the outrageous pricing policies of Brown (manufacturer of electric. Oral B toothbrushes), namely recommending the initial purchase of the handpiece and to have at least done a little bit against the German throwaway society.
Conclusion: Immaculate battery that Einabu is not necessarily suitable for laymen.
