Battery Replacement Guide for Braun Oral-B Type 4729 Toothbrush - Professional Care - YouTube
Amazon.com: FDK OEM NiMH Replacement Battery Compatible with Some Selected Braun Oral-b Triumph Professional Care Toothbrush with Narrow Tabs, (42L x 17D mm, 2150 mAh) : Everything Else
Amazon.com: Replacement Battery Compatible with Braun Oral-b Professional Care Toothbrush, 1150 mAh, Panasonic NiMH, 42 mm Long, 14 mm Diameter : Health & Household