Amazon.com: FDK OEM NiMH Replacement Battery compatible with Braun Oral-b Type 3731 or 3745 Toothbrush, with Narrow tabs (42L x 17D mm, 2150 mAh) : Health & Household
Amazon.com: FDK OEM NiMH Replacement Battery Compatible with Braun Oral-b Triumph Professional Care Toothbrush with Narrow Tabs, (48L x 17D mm, 2700 mAh) : Everything Else
Braun Oral-B Type 3754 & 3756 Battery Replacement Guide
Amazon.com: FDK OEM NiMH Replacement Battery Compatible with Braun Oral-b Triumph Professional Care Toothbrush with Narrow Tabs, (48L x 17D mm, 2700 mAh) : Everything Else
Battery Replacement Guide for Braun Oral-B Vitality Electric Toothbrush - YouTube