Amazon.com: Replacement Battery Compatible with Braun Oral-b Professional Care Toothbrush, 1150 mAh, Panasonic NiMH, 42 mm Long, 14 mm Diameter : Health & Household
Replacing the battery of a Braun oral-b toothbrush : r/DIY
Replacing the battery in a Braun Electric Toothbrush - YouTube
Battery Braun Oral B Toothbrush | Ni Mh Battery Braun Toothbrush - 2pcs Oral-b 3709 - Aliexpress
2500mAh 4/5A 1.2V Rechargeable Ni MH Battery 17430 4/5 A cell with welding tabs for Braun Oral B electric toothbrush 43mm x 17mm| | - AliExpress