Changing a Pulsar watch battery is a quick and easy chore. However, caution should be exercised not to damage the watch or void the warranty if the watch is new and purchased from an authorized dealer. pulsar watches are part of the Japan-based Seiko Watch Company family with millions of Pulsars sold worldwide. Pulsar has gained a reputation for producing durable outdoor watches to complement its fashion line. Pulsar watch batteries should be changed every four to five years, regardless of whether the watch has stopped, to prevent damage from a leaking battery.

Open the Pulsar watch snap case back with a case blade by inserting it between the case and case back. Outdoor sports models have screw-down case backs. Use a jar opener grip on the case back by rotating the case back counterclockwise until the case back is free from the case. Use needle-nose pliers as a last resort for stubborn case backs–insert the ends of the pliers into the slots on opposite sides of the case back and rotate counterclockwise. Take care not to scratch the case back with the pliers. A rubber gasket will come out with the case back.

Locate the battery, a small silver disc held by either a side-mounted spring or a flat strap across the top of the battery, according to Watchbatteries.com.

Insert the toothpick between the battery and spring and pop out the battery. Use a screwdriver to loosen, but not to remove, the strap screw if the battery is held by a strap. Use tweezers to remove the battery.

Note the battery size and take it to a jeweler or watch repair shop for a replacement. Using the tweezers, insert the new battery in reverse order of the way you removed it. Try not to touch the battery with your fingers. Tighten the screw on the strap holder if the Pulsar watch is equipped with a strap holder.

Replace the rubber gasket, which protects the quartz movement (the electronic device that runs the watch) from water or moisture. Slip the gasket into the case rim of the Pulsar watch. Make sure the gasket is not brittle, cracked or torn. Replace it if it’s damaged. Ensure the gasket is flush against the rim.

Snap the Pulsar watch case back into place or screw it into place clockwise if it’s a screw-down version.