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Amazon.com: Replacement Battery compatible with Braun Oral-b Triumph Professional Care Toothbrush, 42 mm L X 17 mm D : Health & Household
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Braun Oral-B Electric Toothbrush Battery Replacement – Everyday Knosticism
Braun Oral-B ProCare/Triumph Repair: How to replace Rechargeable Battery - YouTube
Oral-B Triumph Professional Care 3738 Toothbrush Battery Narrow Tabs 43mmLx17mmD | eBay