Philips Sonicare HX6710 Replacing the Battery

Remove the brush head

Using a thin screwdriver carefully pry open the bottom of the case.

Remove lower cap (2 plastic tabs). O-ring is already removed in this picture.

Here are the solder connections of the battery: + (red) and - (yellow).

Unwrap the battery and replace it (see Soldering Skills).

To avoid a short circuit (the battery will normally still have a remaining charge), start at the positive pole of the battery and unsolder completely from the board.

Continue with the negative pole.

At the end, loosen the soldering pads from remaining solder, so that the contacts of the new battery can be inserted into the board.

Solder teh positive and negative pole.

Requires a 3.7V battery, which is approximately 14mm x 49mm (similar to AA).

Before assembly, check the upper seal and the lower O-ring and replace those if necessary.