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
Used Braun Oral-B Type 3731 Triumph Series 9000 Smart Charger OEM Charging | eBay
BRAUN Oral B Professional Care Type 3731 and 13 similar items
For Oral B / Braun Type 3731 Electric Toothbrush Charger Only US Plug|AC/DC Adapters| - AliExpress
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
For Oral B / Braun Type 3731 Electric Toothbrush Charger Only US Plug|AC/DC Adapters| - AliExpress