Compatible with Philips Sonicare Flexcare Li-ION 3.7V Toothbrush Repair Compatible with AirFloss 100 Series, DiamondClean 300 Series, Diamond Clean HX9332 HX9332/04, FlexCare Platinum HX9170 HX9170/10 HX9110 HX9110/02, FlexCare+ HX6921 HX6972 HX6160 HX6950 HX6992 HX6993 HX6711 HX6712 HX6730 HX6731 HX6732 HX6780 HX6781 HX6782 HX9342 HX6733 HX6750 HX6511 HX6530 HX6581 HX6582 FlexCare+ProDispense. Please, notice that to replace the battery it is necessary to disassemble the Toothbrush. All Toothbrushes require soldering to install battery. If You are not sure that can disassemble the Toothbrush and install the battery correctly, we recommend to ask a specialist for help.