HQRP® Rechargeable Battery Replacement; Battery Voltage: 3.7V, Capacity: 800mAh; Li-Ion; Battery size: 49mm x 14mm; Please pay attention this battery is only compatible with the models listed in the item. 200 Days warranty! Compatible with Philips Sonicare HX6150 HX6902 HX6910 HX6911 HX6912 HX6932 HX6933 HX6952 HX6982 HX6311, Sonicare Elite R900 Series HX6942 HX6942/04 FlexCare+ HX6921 HX6972 HX6160 HX6950 HX6992 HX6993 HX9332/04 HX9110/02; Please pay attention this battery is only compatible with the models listed in the item. Compatible With Philips Sonicare HX6150 HX6902 HX6910 HX6911 HX6912 HX6932 HX6933 HX6952 HX6982 HX6311, Compatible With Sonicare Elite R900 Series HX6942 HX6942/04 FlexCare+ HX6921 HX6972 HX6160 HX6950 HX6992 HX6993 HX9332/04 HX9110/02 HX8911 HX8910. 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 Compatible With help. Please pay attention this battery is only compatible with the models listed in the item.