FDK Replacement Battery Compatible with Braun Oral-b Triumph Professional Care -Type 3731 or 3745- Toothbrush -42mm Long- 17mm Diameter- 2150mAh-

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 system, including handle, brush head, and charger! Bring your old toothbrush to life again by replacing the dead battery. Battery is fully tested before shipping. Due to the nature of battery product, No return is accepted after it has been installed. Battery replacement instruction, repair services, and toothbrush model reference can be found at http://etoothbrushbattery.com