Amazon.com: FITHOOD Replacement Battery for Oral-B 3738 Triumph 9000 Professional Care 8000 Professional Care 8300 Professional Care 8500 Professional Care 9500 Triumph 4000 : Health & Household
Amazon.com : Replacement Toothbrush Heads Fit for Oral B Electric Toothbrushes, 4PCS, Soft Ultrathin Bristles for Pro Gum Care, Refills for Braun Toothbrushes Model 3756 3757 3744 3765 3738 4729 4739 : Health & Household
Powery battery for model Oral-B toothbrush 3738, 1,2V, 2500mAh/3,8Wh, NiMH, 49,8mm x 17,3mm x 17,3mm, 100% Compatible. New - AliExpress
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Braun Oral-B Triumph v1 Battery Replacement Guide
FITHOOD Replacement Battery for Oral-B 3738 Triumph 9000 Professional Care 8000 Professional Care 8300 Professional Care 8500 Professional Care 9500 Triumph 4000