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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
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Battery Replacement Guide for Braun Oral-B Type 3756 & 3754 Professional Care and TriZone Toothbrush - YouTube
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Replacement Battery for Braun Oral B 3745 3728 3762 7000 3731 P7000 D25 D28 Electric Toothbrush 1.2V 42mm x 17mm Batteries - AliExpress
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Battery Replacement Guide for Braun Oral-B Type 3756 & 3754 Professional Care and TriZone Toothbrush - YouTube
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