LG G Watch R Power Button

Place the watch upside down on a hard surface so that its back case is facing upright.

Use a T4 Torx Star screwdriver to remove the four 4.0 mm Torx screws from the corners of the back case.

Use a plastic opening tool to pry open the back case from both sides of the watch.

Remove the back case.

With a plastic opening tool, disconnect the four connectors on the top of the motherboard.

Remove three 3.0 mm Phillips screws on the edges of the motherboard with a Phillips #000 screwdriver.

Grasp the edges of the motherboard and slide it slightly towards the right to remove it from its case.

Use a plastic opening tool to pry the battery out of the device.

Pry the battery housing from the top right corner using a spudger.

Once loosened, remove the battery housing.

On the power button, locate a small grey washer on the interior side of the watch.

Use a pair of tweezers or another pointed object to push the washer out of its socket, and remove the power button.