This guide shows you how to open and repair the Braun Oral-B Type 3754 and 3756 electric toothbrush models by replacing the battery. Can I replace the battery in my Type 3766/3767 Braun Oral-B toothbrush? Yes you can replace the battery in the Type 3766/3767 Oral-B Pro/Smart toothbrushes. Follow our guide above to see how to open up your toothbrush handle and replace the internal rechargeable battery. Braun Oral-B Type 3766 & 3767; Braun Oral-B Type 4729; Other Toothbrush Models; Blog/Info. Toothbrush Battery Replacement Service; One of the ways that you may find your original battery pack is different from the new replacement battery pack supplied by us is that the positive (+) and negative (-) terminals are swapped over. Braun Oral-B Type 3766 & 3767; Braun Oral-B Type 4729; Other Toothbrush Models; Blog/Info. This is a new replacement battery from GP Batteries fitted with specially aligned solder tags to fit some of the Braun Oral-B Triumph v1 range of toothbrushes. Triumph v1 toothbrushes are all marked with type numbers 3731, 3738 or 3745 on the bottom New Battery Replacement Guide for Braun Oral-B Type 3756 & 3754 Published At Ionic Industries we have published another free guide to replacing the battery inside a Braun Oral-B electric toothbrush, this time for the Professional Care Type 3756 and 3754 models. Toothbrush Battery Replacement Service; Braun Oral-B Toothbrush Chargers; Sonicare Toothbrush Spare Parts & Chargers; For your Oral B type 3738 you will need a 17mm diameter battery with an offset negative solder tag. Your original battery will be either 42mm long or 49mm long. New Repair Video for Braun Oral B Type 3766 and 3767 This guide shows you how to open and how the Braun Oral-B Type 3754 and 3756 electric toothbrush models from substitution the battery. See this page to help you compare Oral-b electric toothbrushes. We give an overall recommendation, compare brushes against each other (and include a chart). For example, the type '3766' also known as model number 'D501' is used for the Oral-B GumCare 2, Pro 2, 2000, 2500, 2900, 2950, Pro 1000, Pro 1500, Pro 2000, Pro 3000, Pro 4000 Replacement Sony battery for Braun Oral-B iO Series toothbrushes fitted with 49mm long AA size Li-ion batteries including the iO6, iO7, iO8 & iO9 toothbrush. Braun Oral-B Type 3766 & 3767; Braun Oral-B Type 4729; Other Toothbrush Models; Blog/Info. Toothbrush Battery Replacement Service; We have now published our latest battery replacement guide online, this time for repairing the Braun Oral-B Professional Care Type 3728 models. The type number of your toothbrush is marked on the bottom of the handle. The Braun Oral-B Type 3728 goes by many different names on the box including: Professional Care 7400. Professional Care 7550. HWq9J9.