Battery 101


Replacement battery for Braun Oral B Triump model 3731 3738 3745 with Offset tags

These NiMH 1.2V compatible batteries are ideal replacements for some of the Braun Oral-B Triumph version 1 toothbrush models.

Compatible with Triumph v1 toothbrushes with type numbers 3731, 3738, and 3745 (as indicated on the handle), specifically those equipped with a built-in screen. These replacement battery incorporates an OFFSET negative solder tag (see images) to accommodate Braun Oral-B Triumph v1 toothbrushes originally configured with 42mm long batteries.

To determine compatibility, please open up your toothbrush and verify the length of the current battery. Braun employed two different sizes for Triumph v1 models based on manufacturing year and region. If your toothbrush features a 49mm long battery, please click HERE.

Note: These replacement battery is equipped with solder tags at both ends, with the negative tag having an OFFSET alignment.


Technical Specifications:

  • Chemistry: Nickel Metal Hydride (NiMH)
  • Voltage: 1.2V
  • Capacity: 1600mAh
  • Length: 42mm (compatible with 41mm, 42mm, 43mm, and 44mm long batteries)
  • Diameter: 17mm

Please fully charge battery before use. 

These are not an appropriate substitute for batteries labelled 3.6V, 3.7V, Li-ion or Lithium-ion. Please use our search bar should you require this type of Chemistry.

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