Amazon.com : Replacement Toothbrush Heads for Oral B Sonic Complete Brush Heads Refills 4 Pack Oralb Braun Compatible Replacement Brush Heads for Sonic, Sonic Complete & Vitality Sonic Oral-B Electric Base :
4717 Oral-B Replacement Parts - Braun
Braun Oral-B Sonic Complete Toothbrush Replacement Battery Set, 1600 mAh NiMH | eBay
Battery Replacement Guide for Braun Oral-B Sonic Complete Electric Toothbrush - Type 4717 - YouTube