Amazon.com: Replacement Battery Compatible with Braun Oral-b Professional Care Toothbrush, 1150 mAh, Panasonic NiMH, 42 mm Long, 14 mm Diameter : Health & Household
Braun Oral-B Sonic Complete Toothbrush Replacement Battery Set, 1600 mAh NiMH | eBay
4729 Oral-B Replacement Parts - Braun
Replacement battery for Braun Oral-B Professional Care Type 4729 with 4/5AA cells : Amazon.nl: Health & Personal Care
Battery Replacement Guide for Braun Oral-B Sonic Complete Electric Toothbrush - Type 4717 - YouTube