If your toothbrush loses power quickly or doesn't hold charge, most likely the rechargeable battery is dead. Don't waste money on a new toothbrush
FDK Replacement Battery Compatible with Braun Oral-b Triumph Professional Care (Type 3731 or 3745) Toothbrush (48mm Long, 17mm Diameter, 2700mAh) : Everything Else
Brand New FDK Replacement Battery for Oral-B Triumph Professional Care, 2700mAh
FDK Replacement Battery compatible with Braun Oral-b Triumph Professional Care Toothbrush (49mm Long, 17mm Diameter, 2700mAh, Neg tab off-center) : : Health & Personal Care
Braun Oral-B Triumph v1 Battery Replacement Guide
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
New 1.2V 2800mAh Ni-MH Battery For Braun Oral B Triumph 5000 9000 9500 9900 Electric Toothbrush Batteries 49mm x 17mm
HQRP 42mm Long Battery Compatible with Braun 5000, 3745, 3761, 3762, 5000 Toothbrush Repair 2000mAh Professional Care Triumph Sanyo 346 Sanyo346 : Health & Household
HQRP 42mm Long Battery Compatible with Braun 5000, 3745, 3761, 3762, 5000 Toothbrush Repair 2000mAh Professional Care Triumph Sanyo 346 Sanyo346 : Health & Household
Braun Oral-B Triumph v1 Battery Replacement Guide
Replacement Battery for Braun Oral B Triumph 5000 9000 9500 9900 Electric Toothbrush Batteries 49mm x 17mm - AliExpress
FDK OEM NiMH Replacement Battery Compatible with Braun Oral-b Triumph Professional Care Toothbrush with Narrow Tabs, (42L x 17D mm, 2150 mAh) : Buy Online at Best Price in KSA - Souq
Replacement Battery for Braun Oral B Triumph 5000 9000 9500 9900 Electric Toothbrush Batteries 49mm x 17mm - AliExpress