How to replace the Philips Sonicare Airfloss HX8140, HX8230, HX8240 Battery - YouTube
Philips One by Sonicare Battery Toothbrush | Philips Sonicare
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