Amazon.com: FDK OEM NiMH Replacement Battery Compatible with Some Selected Braun Oral-b Triumph Professional Care Toothbrush with Narrow Tabs, (42L x 17D mm, 2150 mAh) : Everything Else
BORNMIO Replacement Battery for Oral-B Professional Care 8500 9900 Toothbrush 3731 3738 (2500mAh)
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🥝 ORAL-B Braun TRIUMPH Professional Care EL Toothbrush Type 3731 handle Only J8 | eBay
Amazon.com: HQRP 49x17mm Battery Compatible with Braun Triumph ProCare 9900 9500 9400 9000 3731 Toothbrush Replacement : Health & Household
🥝 ORAL-B Braun TRIUMPH Professional Care EL Toothbrush Type 3731 handle Only J8 | eBay
For Oral B / Braun Type 3731 Electric Toothbrush Charger Only US Plug|AC/DC Adapters| - AliExpress
New Geek Power Replacement Battery for Braun Oral-B Triumph Type 3731 3738 3745 602589723402 | eBay