Updated July 21, 2017 Turn your Casio solar watch face-down to reveal the back plastic cover that is secured in place with six small screws. Some Casio models have two screws on either side of the watch face as well. Remove all the screws securing the back cover with your Phillips head screwdriver. Remove the screws on the side of the watch if applicable. Remove the back plastic cover from the watch by grabbing it with your fingers at either side and lifting it up. Remove the metal plate directly under the plastic cover the same way. Then use your fingers to remove the rubber protector directly under the metal plate to reveal the metal battery compartment. Insert the tip of your tweezers into the small hole directly under the battery compartment. The battery compartment is a circular latch in the center of the watch that is marked “Battery.” Gently push the tweezers into the hole and then lift up to release the battery cover and reveal the battery itself. Lift the thin metal bar that holds the battery in place with the tip of your tweezers and remove the battery from the compartment. Slide the new battery (available at any electronics store or online) into the compartment and place the metal bar over it. Replace the battery cover and reassemble your Casio solar watch in the reverse order you took it apart. Writer Bio
