Amazon.com: 800mAh 3.7v Li-ion Electric Toothbrush Replacement Battery Compatible with Philips HX8911/02 HX9110/02 HX9112 HX9111/12 HX9903/11 HX9957/51 HX9954/56 HX9924/65 HX9924/61 Series with Pins : Health & Household
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