AKKU 31135: Battery for Philips Sonicare DiamondClean, Li-Ion, 700 mAh at reichelt elektronik
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