How to Replace the Battery from an Armitron All-Sport Watch

Remove the back strap.

Remove four 1.7 mm Phillips Pan Head screws.

Pull back on the strap, while keeping a finger pressed to the metal covering.

Gently pull away the metal covering away from the watch.

Pinch the metal tab.

Pull the chip up and out.

Remove two 1.5 mm Phillips Pan Head screws.

Remove the battery.

Take note of the orientation the battery is in for proper replacement.