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Introduction

Here is how to replace the rechargeable battery in the Phillips SoniCare FlexCare HX6930. This is a difficult repair, be careful. If you see a swollen battery, follow the instructions here: What to do with a swollen battery.

What you need

Step 1 Battery

Philips Sonicare FlexCare Battery Replacement, Battery: step 1, image 1 of 1

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

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Step 2

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.
Have a look to an alternative opening procedure.

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Step 3 Do not press on the shaft!

Philips Sonicare FlexCare Battery Replacement, Do not press on the shaft!: step 3, image 1 of 1

The previous version of this step told people to press on the shaft until the electronics were exposed. DO NOT DO THIS, it can snap locking tabs off
Using a small flathead screwdriver, release the two black locking tabs holding the internals in place
Slide the internals out of the toothbrush casing
Until this step is updated with new pictures, scroll down to step 5 to see the two tabs

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Step 4

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

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Step 5

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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Step 6

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.