Amazon.com: Replacement Battery compatible with Braun Oral-b Triumph Professional Care Toothbrush, 42 mm L X 17 mm D : Health & Household
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 Type 3754 & 3756 Battery Replacement Guide
Braun Oral-B Type 4729 Professional Care Battery Replacement