If the number displayed on the bottom of your FlexCare Platinum handle is HX9150, that's okay – your product is an authentic Sonicare FlexCare Platinum and is fully supported by the Sonicare servicing policy. If the number on your Sonicare handle begins with HX91 followed by additional digits then your handle is in the FlexCare Platinum family of products and is fully supported. This includes the following products:
xx = all additional numbered versions
If you have any questions about your Sonicare please contact the Philips Support Center at the number found on the product support page.