You can change most Citizen watch batteries yourself with basic tools, but some models require a professional

Most Citizen watches use a standard coin-cell battery that you can replace at home if the case back is not sealed. You will need a case opener (a flat tool that costs $5 to $15), tweezers, and a replacement battery in the correct size for your model. The whole job takes 10 to 15 minutes. However, if your Citizen is water-resistant, has a screw-down case back, or is a solar or kinetic model, you should take it to a jeweler or Citizen service center instead—opening it yourself can damage the seal or the movement.

The difference between a watch you can open and one you cannot comes down to the case back design. Snap-off case backs are designed to be removed by hand or with a straightforward tool. Screw-down case backs and sealed water-resistant cases are not, and forcing them risks permanent damage to your watch.

Key Takeaways

  • Most Citizen watches have a snap-off case back that you can open with a case opener tool, but water-resistant models require professional service to maintain their seal.
  • You need to know your watch model number to order the correct replacement battery, which you can find on the case back or in your manual.
  • A case opener, tweezers, and the right battery are the only tools required for a home battery change on non-sealed watches.
  • If your watch is solar-powered, kinetic, or has a screw-down case back, a jeweler or Citizen service center should do the work to avoid damage.

Check whether your watch can be opened at home

Before you buy tools, determine whether your Citizen is designed for home battery replacement. Look at the case back—the metal or plastic panel on the back of the watch. If it has a smooth edge with a small notch or slot, it is a snap-off case back and you can open it yourself. If it has grooves or a threaded ring, it is a screw-down case back and requires a professional.

Water-resistant watches—those marked "water-resistant," "splash-resistant," or with a depth rating like "50m"—should not be opened at home. The case back seal keeps water out, and removing it yourself can break the seal even if you close it again. Citizen solar watches (Eco-Drive) and kinetic watches (which charge from movement) have internal components that are more complex and should be serviced by a professional. Check your manual or Citizen's website by model number to confirm.

Find the correct replacement battery

Citizen watches use standard batteries labeled with codes like SR626SW, SR927SW, or CR2032. You need to know which one your watch uses before you open it. The battery type is usually printed on the case back itself, or you can find it in your watch manual. If you have neither, search for your watch model number online plus the word "battery"—most Citizen models have the battery size listed on fan sites and retailer pages.

Order the battery from a pharmacy, electronics store, or online retailer. A replacement battery costs $3 to $8. Buy a name-brand battery (Energizer, Panasonic, or Renata) rather than a generic one—cheap batteries drain faster and can damage the watch movement. Some jewelers will also sell you the battery and change it for $10 to $20 if you prefer not to do it yourself.

Gather your tools and prepare your workspace

You will need a case opener (also called a case knife or case back remover), tweezers, and the replacement battery. A case opener is a flat metal tool with a notch or slot that fits into the case back. You can buy one at any jewelry supply store, many pharmacies, or online for $5 to $15. Tweezers help you handle the small battery without touching it with your fingers, which can leave oils that shorten battery life.

Work on a clean, flat surface with good light. Lay out a small cloth or paper towel to catch any small parts if they fall. Wash your hands before you start so you do not transfer oils or dirt to the battery or the inside of the watch. If your watch is very dirty, rinse the outside with water and dry it completely before opening.

Remove the case back and old battery

Locate the small notch or slot on the edge of the case back. Insert the flat end of your case opener into the notch and gently twist or pry upward. The case back should pop off—do not force it, as you can scratch the watch or bend the case back. Set the case back aside on your cloth.

Inside, you will see the battery sitting in a small metal holder or compartment. Use your tweezers to lift the battery straight up and out. If the battery is stuck, a tiny dab of rubbing alcohol on the tweezers can help loosen it, but do not pour liquid into the watch. Set the old battery aside. Look inside the case to make sure there are no other small parts loose—if you see a gasket (a rubber ring) or a metal spacer, leave it in place.

Install the new battery and close the case

Using your tweezers, pick up the new battery by its edge, not its flat face. Orient it so the positive side (marked with a + or the shiny side) faces up, toward the dial. Gently lower it into the battery compartment and press down until it sits flat and clicks into place. The battery should not be forced—if it does not sit easily, check that you have the right size and that the positive side is facing the correct direction.

Align the case back with the case and press down firmly until it snaps closed. You should hear or feel a click. Wipe the outside of the watch with a dry cloth. Set the watch aside for a few minutes, then check that it is running. If the second hand is not moving, the battery may not be seated correctly—open the case back again and reseat the battery.

When to take your watch to a professional

If your watch is water-resistant, has a screw-down case back, or is a solar or kinetic model, take it to a jeweler or Citizen service center. A jeweler will charge $15 to $40 for a battery change and will test the water-resistance seal afterward. Citizen service centers can be found through Citizen's website and typically charge $25 to $50, but they can also service the movement if something else is wrong.

If you open your watch and find parts you do not recognize, or if the battery does not sit properly, close it back up and take it to a professional. Forcing a battery into the wrong position can damage the movement and cost far more to repair than a professional battery change would have cost.

Frequently Asked Questions

How long does a Citizen watch battery last?

Most Citizen watch batteries last two to five years, depending on the model and how often you wear the watch. Quartz watches use more battery power than solar or kinetic models. If your watch stops after less than a year, the battery may be defective or the watch may have a problem with the movement.

Can I use any battery that fits in the case?

No. You must use the exact battery type specified for your model. Using the wrong size or chemistry can damage the movement or cause the watch to run fast or slow. Always check your manual or the case back before ordering.

What if the case back is stuck and will not open?

Do not force it. Soak the edge of the case back in warm water for a few minutes to loosen any corrosion, then try again with your case opener. If it still will not budge, take it to a jeweler—they have tools that can open it without damaging the watch.

Do I need to replace the gasket when I change the battery?

For non-water-resistant watches, no. For water-resistant watches, a professional should replace the gasket every time the case back is opened to maintain the seal. This is another reason to have a jeweler handle water-resistant models.

What should I do with the old battery?

Take it to a pharmacy, electronics store, or battery recycling center. Batteries contain materials that should not go in the trash. Most pharmacies have a battery drop-off bin near the checkout.