Amazon.com : Upgraded 800mAh 3.7v Li-ion Electric Toothbrush Replacement Battery Compatible with Philips HX9360 HX6340 HX6610 HX6970 HX6511 HX6711 with Extra Rubber Seal : Health & Household
Amazon.com: Replacement Battery with Pins for Philips Sonicare Elite HX7400 Toothbrush, FDK NiMH, 2150 mAh : Health & Household
How To Replace Battery In Philips Sonicare Toothbrush