Ni-MH 42mm x 14mm Braun Toothbrush Battery

(7 customer reviews)


42mm x 14mm NiMH Replacement Toothbrush Battery for Braun Oral-B Type 3754, 3756 and certain other electric toothbrush models.


This is a new replacement battery to fit certain Braun Oral-B, Philips Sonicare and other manufacturers’ electric toothbrushes.

This battery is fitted with solder tags ready for you to solder it into your toothbrush and give it a new lease of life.

It is strongly recommended that you open up your toothbrush before ordering from us to double-check the measurements. See our battery replacement guides section for instructions on replacing your toothbrush battery.

  • Length: 42mm (suitable for replacing 41mm, 42mm, 43mm and 44mm long batteries)
  • Diameter: 14mm
  • Voltage: 1.2V
  • Capacity: 1200mAh
  • Chemistry: NiMH
  • Brand: ESP Batteries
  • Tagged at both ends for soldering

This battery is a replacement for most Braun Oral-B Professional Care and TriZone type 3754 and 3756 toothbrush models along with some others, including some versions of the type 4729 and some versions of the type 3728 toothbrushes.

This battery also fits various rechargeable shavers, trimmers and hair clippers such as the Philips Philishave HQ 282, 282A and 4601.

See additional photo for polarity identification (+/-). Not suitable for replacing Li-ion batteries. The fitted solder tags will need trimming to suit your toothbrush.

Also replaces certain original batteries of the same dimensions with some of the following markings, and others.

Braun Oral-B battery markings:
Nickel Metal Hydride

7 reviews for Ni-MH 42mm x 14mm Braun Toothbrush Battery

  1. mark_y

    Brilliant, useful website, a great product, new life in toothbrush!

  2. ERNESTO (verified owner)

    Great idea and great service.

    I received batteries in a few days in Spain, I follow the detailed instructions for replacing them, and know my toothbrushes work like it they were a new ones.

    Thank you very much. Continue in this way!

    • Ionic Admin

      Thanks for your comments Ernesto!

  3. Judy

    I was about to toss my toothbrush when I came across Ionic! I never could have done the installation without the very clear illustrated directions. It took me about 30 minutes to remove and replace the battery. The battery arrived here (California) faster than many things shipped from within the US.

  4. Roman (verified owner)

    I ordered two batteries to replace old in my 3756. Delivery to Georgia, US was on time. I followed the how to guide here. It took me 30min -1 hour to replace first one, but second one went really quick. After charging new battery, it holds charge like new one. Thank you.

  5. Mehdi (verified owner)

    Amazing service by Rob! Ordered new batteries for my old toothbrush, ordered wrong ones, Rob was very cooperative and agreed to replace the batteries! Excellent service!

  6. David

    Great service from Rob, who kindly swopped the battery ordered by mistake for the correct one. Now have a recharged working toothbrush. Thank you very much.

  7. Trevor (verified owner)

    Excellent and precise instructions with video or photos I used the photos very clear with green arrows for important bits best to use a desoldering iron with a small tip used this to replace my battery for my pro2500 tooth brush after sending to braun and them saying we don’t repair them they are designed for throwing away when they go wrong unless under warrenty

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