This does not work with all 99 series models. When I searched for our model number. This device has arrived. However, our model requires a different charger. We are in Mexico over the winter and left our own charger at home. We thought it would be easy to replace it. It was a long search to find the right charger. I believe this is an issue with Sonicare where they cannot match their chargers. We will switch to other toothbrush models.
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