Philips Sonicare DiamondClean Battery Replacement

Pull the head from toothbrush.

Use a nylon spudger to pry the chrome cap at the bottom off.

Use a nylon spudger to release the black tabs on either side of internals.

Put the metal head on a solid surface with handle perpendicular to the surface. Firmly, yet gently, push down until the internals start to slide out.

Remove rubber covers from the top of the motherboard and the back of the battery.

Using a soldering iron, remove the solder from the three marked spots.

The pins are labeled "F1", "R6", "JP1"

After de-soldering, the battery should be loose. If this is not the case, spend more time removing the solder.

When the battery comes loose, gently wiggle it out and away from the device.

Carefully reinsert the new battery into the same spot as the old one. Gently press until it is firmly pressed against the toothbrush.

Apply a small amount of solder to the three points shown to attach the battery.

The pins are labeled "F1", "R6", "JP1"

Replace the rubber covers on the motherboard and battery.

Reverse the case replacement guide to finish putting the toothbrush back together.