The rechargeable battery in the tooth brush will be replaced.

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  • Pull the brush head away from the handle to remove it.

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  • Push the flat edge of a metal or nylon spudger between the seal and the toothbrush body and pry it open. Do this all around the edge until the seal is partially sticking out.

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  • Apply pressure to the shaft by pressing it against a firm and flat surface. Continue to apply pressure until the electronics located in the interior are exposed.

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  • Grab the circular, plastic base with the o-ring and pull it outward.

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  • Remove the cap that is attached to the end of the interior by removing the two clasps that are holding it in place.

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Image 1/1: The soldering points are shown in red.
  • Desolder the battery from the circuit board. Here is a guide on how to desolder. Remove the old battery and replace it. Using the same guide, solder the battery in place.

  • The soldering points are shown in red.

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To reassemble your device, follow these instructions in reverse order.

4 other people completed this guide.

Joanna Moraza

Member since: 04/14/2015

417 Reputation

3 Guides authored


Cal Poly, Team 4-6, Maness Spring 2015 Member of Cal Poly, Team 4-6, Maness Spring 2015


4 Members

7 Guides authored


has anyone ever done this successfully? OMG it seems daunting!!!!

Jo - Reply

I'm going to try it. Now, to find a battery source.

Scott Minton - Reply

Anyone knows where to purchase such battery and its type/sort code?

Ben Salem - Reply

The battery is a 14500 li-ion with soldered pins.

I bought this one without pin and will try to solder them:

Here, you can buy the version with pins:

mamuc -

Prying open the bottom of the brush like that can damage the plastic. There's a damage-free technique detailed on this guide:

Dave W - Reply

I was able to do this after modifying the procedure

I used a tiny snip to cut the negative lead just above the circuit board. I had to remove a little of the plastic surrounding the lead with an Xacto knife in order to do this. Cutting the lead allowed me to pivot the battery upward out of its holder. Then I removed the battery by pulling it out of the circuit board while heating the positive lead's connection to the circuit board. After removing the battery, I drilled holes in the solder left covering the holes in the circuit board (never had much luck removing solder). I was then able to easily insert the new battery, clip the excess length from its pins, and reassemble the toothbrush.

Probably should fully discharge the old battery before trying to remove it.

raylat2002 - Reply

This is ridiculous. I've never had changing a battery be so complicated. I'll find another brand that is done with this!!!

Drena A Dobra - Reply

And Drena A Dobra, found an other brand that has an easier to replace battery?

I don't think so. This is common use. They make it all the time more difficult.

Kostenzer - Reply

Dear Joanna, I have an alternative suggestion for the screwdriver operation. You can heat carefully the outer part of the hand pieces. You should cover the rest of the pieces so approximately 1.5cm is exposed to the heat of eg. A heat gun. When is heated (give it a several tried to not overheat the plastic) then you bring enough force on the distal part like in your description. When assembling apply some silicongrease to the distal and proximal seals to garantee smooth assembly and setting of the seals and to achieve continued waterresistance of the body. Regards and success!

Leo van de Goor - Reply

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