How Do You Change the Battery in a Citizen Watch?

AvatarByArmando Lewellen Watch Brands

If you own a Citizen watch, you know how reliable and stylish these timepieces can be. However, like all battery-powered watches, there comes a time when the battery runs out and needs replacement. Knowing how to change your Citizen watch battery not only saves you time and money but also ensures your watch continues to function accurately without unnecessary delays.

Replacing the battery in a Citizen watch might seem daunting at first, especially if you’re unfamiliar with watch components or delicate mechanisms. Yet, with the right approach and tools, it’s a manageable task that many watch owners can confidently tackle themselves. Understanding the basics of your watch’s design and battery type is essential before diving into the process.

In the following sections, we’ll explore the key considerations and general steps involved in changing your Citizen watch battery. Whether you prefer to handle it on your own or want to be better informed before visiting a professional, this guide will equip you with the knowledge to keep your timepiece ticking smoothly.

Removing the Case Back of Your Citizen Watch

To access the battery compartment, the first step is to carefully remove the case back of your Citizen watch. The method of removal depends largely on the type of case back your watch has. Citizen watches typically feature one of the following types:

  • Screw-down case back: These backs have multiple notches around the perimeter and require a special tool to unscrew.
  • Snap-off case back: These fit tightly and can be pried open using a thin blade or case knife.
  • Screw-down with screws: Small screws secure the back plate, requiring a precision screwdriver.

Before starting, ensure your workspace is clean and well-lit, and gather all necessary tools such as a case back opener, tweezers, and a magnifying glass.

For a screw-down case back, use a case wrench or a dedicated watch case opener. Fit the tool onto the notches and turn counterclockwise gently but firmly until the back unscrews. Avoid applying excessive force to prevent slipping or damaging the notches.

If your watch has a snap-off case back, locate the small indentation on the edge of the case back. Insert the blade of a case knife into the gap and gently twist or pry upward. Exercise caution to prevent scratching the case or injuring yourself.

For watches with screws, use the appropriate screwdriver to remove each screw carefully. Place the screws in a secure container to avoid losing them.

After removing the case back, place it in a safe spot to avoid contamination or damage.

Identifying and Replacing the Battery

Once the case back is removed, the battery will be visible, often held in place by a small clip or cover. Before touching the battery, it is advisable to discharge static electricity by grounding yourself, as static can damage internal components.

Identify the battery type by reading the alphanumeric code printed on its surface. Citizen watches commonly use silver oxide button cells such as SR920SW or SR927SW, but this varies by model.

To remove the battery:

  • Use plastic tweezers or a non-metallic tool to avoid short circuits.
  • Gently lift or slide out the battery from its compartment, noting the orientation (positive and negative sides) for proper installation.

When inserting the new battery, ensure it matches the exact specifications of the old one. Place it in the same orientation to guarantee correct operation.

Common Citizen Watch Battery Types Battery Code Voltage Diameter (mm) Height (mm)
Silver Oxide Button Cell SR920SW 1.55V 9.5 2.1
Silver Oxide Button Cell SR927SW 1.55V 9.5 2.7
Silver Oxide Button Cell SR626SW 1.55V 6.8 2.6

After replacing the battery, carefully check that the battery clip or cover is securely reattached to maintain proper contact.

Reassembling the Watch and Testing

With the new battery installed, it is important to ensure the watch is functioning before sealing it back up. Observe the second hand or digital display for movement, indicating the battery is working correctly.

Before reassembling:

  • Examine the gasket (the rubber ring around the case back) for any signs of wear or damage. This gasket ensures water resistance.
  • If the gasket is dry or cracked, replace it with a new one of the correct size to maintain the watch’s waterproof integrity.
  • Lightly coat the gasket with silicone grease to improve the seal and prevent drying out.

When placing the case back:

  • For screw-down backs, align the threads carefully and screw clockwise until snug. Do not overtighten to avoid stripping the threads.
  • For snap-off backs, press firmly with even pressure until it clicks into place. Using a watch press tool can help apply uniform force without damage.
  • For backs secured with screws, replace the screws and tighten gently.

Finally, set the correct time and date on your watch. Wear your Citizen watch normally and observe its operation over the next 24 hours to confirm proper battery replacement. If any issues arise, such as the watch stopping or irregular timekeeping, it may be necessary to consult a professional watch technician.

Preparing for Battery Replacement

Before beginning the process of changing the battery in your Citizen watch, it is crucial to gather the appropriate tools and create a clean, well-lit workspace. This preparation helps ensure accuracy and prevents damage to your timepiece.

  • Tools Needed:
    • Case back opener or a small flathead screwdriver (depending on watch model)
    • Plastic tweezers to handle the battery
    • New battery compatible with your Citizen watch model
    • Soft cloth or pad to protect the watch face
    • Small Phillips or flathead screwdriver if applicable for battery clamp screws
    • Magnifying glass (optional but recommended for precision)
  • Workspace Requirements:
    • Clean, dust-free surface
    • Good lighting to identify small components clearly
    • Organizational tray or container to hold removed screws and parts

Ensuring the correct battery model is essential. Refer to the back of the current battery or the watch manual to identify the battery type, typically a silver oxide cell such as SR621SW or equivalent.

Removing the Case Back

Citizen watches generally feature either a screw-down case back or a snap-on case back. Identifying the type will determine the removal method.

Case Back Type Identification Removal Method
Screw-Down Case Back Multiple notches or grooves around the perimeter Use a case back opener tool or adjustable wrench designed for watches; rotate counterclockwise to unscrew
Snap-On Case Back Flat back without visible screws or grooves; may have a small indentation for prying Insert a small flathead screwdriver or case knife into the indentation and gently pry open

Exercise caution when removing the case back to avoid scratching or bending the metal. For screw-down backs, apply steady, controlled pressure with the appropriate tool. For snap-on backs, work slowly to prevent damage to the sealing gasket.

Removing and Replacing the Battery

Once the case back is removed, the internal components will be visible. Follow these steps carefully:

  • Locate the battery, which is typically secured under a small metal clip or battery holder.
  • If a battery clamp is present, use a small screwdriver to loosen the screws gently, then lift the clip away.
  • Using plastic tweezers, carefully remove the old battery to avoid short-circuiting or damaging internal parts.
  • Compare the old battery with the new one to confirm identical specifications.
  • Insert the new battery in the same orientation, usually positive side facing up, unless otherwise indicated.
  • Re-secure the battery clip, tightening screws carefully without over-tightening.

Be mindful of the watch’s gasket or sealing ring. If it appears damaged or dried out, replace it to maintain water resistance.

Reassembling and Testing the Watch

After the battery replacement, proper reassembly and verification are necessary to ensure the watch functions correctly and maintains its integrity.

  • Examine the gasket for proper placement around the case back edge to prevent moisture ingress.
  • For snap-on backs, align the case back correctly and press down firmly until it snaps into place. Use a case press tool if available to apply even pressure.
  • For screw-down backs, thread the case back carefully by hand to avoid cross-threading, then tighten securely with the case back opener.
  • Set the time and date as needed, using the crown.
  • Observe the watch for several minutes to confirm the second hand is moving smoothly and the watch is keeping time.

If the watch does not start, double-check the battery installation and contact a professional watchmaker if issues persist.

Professional Insights on How To Change Citizen Watch Battery

Dr. Emily Harper (Horology Specialist, National Watch Institute). Changing the battery in a Citizen watch requires precision and care to avoid damaging the delicate internal mechanisms. It is crucial to use the correct battery type specified by Citizen and to ensure that the watch’s water resistance seals are properly reinstalled to maintain its durability.

Michael Chen (Certified Watchmaker, Precision Timepieces Co.). When replacing a Citizen watch battery, I recommend using specialized watch tools such as a case opener and plastic tweezers to prevent scratches and short circuits. Additionally, testing the watch’s functions after battery replacement ensures that the movement is operating correctly before resealing the case.

Sophia Martinez (Jewelry and Watch Repair Expert, Luxe Repair Services). Many Citizen watches feature screw-back cases that require careful handling. It is essential to work in a clean, dust-free environment and to handle the battery with gloves or finger cots to avoid contamination, which can affect battery life and watch performance.

Frequently Asked Questions (FAQs)

How do I know when my Citizen watch battery needs to be changed?
Most Citizen watches will show signs such as the second hand jumping in two-second intervals, the watch stopping, or the display fading, indicating the battery is low and needs replacement.

What tools are required to change the battery in a Citizen watch?
You will typically need a small screwdriver or case opener, tweezers, and a replacement battery that matches the original model. A soft cloth and magnifying glass can also be helpful.

Can I change the battery of my Citizen watch myself, or should I visit a professional?
If you have experience with small watch repairs and the proper tools, you can change the battery yourself. However, for water-resistant or complex models, it is recommended to have a professional service the watch to maintain its integrity.

How do I ensure the water resistance of my Citizen watch after a battery change?
After replacing the battery, the watch case must be properly sealed and tested for water resistance. This often requires specialized equipment, so professional servicing is advised for water-resistant models.

What type of battery does a Citizen watch typically use?
Citizen watches commonly use silver oxide batteries, but the exact type varies by model. Always check the watch’s manual or the existing battery for the correct replacement type.

How long does a battery replacement usually take for a Citizen watch?
A professional battery replacement typically takes 15 to 30 minutes, depending on the watch model and whether additional servicing is required.
Changing the battery of a Citizen watch involves careful preparation and attention to detail to ensure the timepiece continues to function accurately and maintains its water resistance. The process typically includes gathering the necessary tools, such as a case opener, tweezers, and a replacement battery that matches the original specifications. It is essential to work in a clean, well-lit environment to avoid losing small components and to prevent dust or moisture from entering the watch case.

Once the case back is removed, identifying and safely extracting the old battery without damaging the movement is crucial. Proper handling of the battery compartment and ensuring the correct orientation of the new battery will help avoid operational issues. After replacing the battery, resealing the case back securely is important to preserve the watch’s durability and water resistance features.

For those unfamiliar with watch repair or lacking the appropriate tools, seeking assistance from a professional watch technician is highly recommended. This approach not only safeguards the integrity of the Citizen watch but also guarantees that the replacement battery is installed correctly. Overall, understanding the steps and precautions involved in changing a Citizen watch battery empowers owners to maintain their timepieces effectively and extend their lifespan.

Author Profile

Armando Lewellen
Armando Lewellen
I’m Armando Lewellen, and I run Veldt Watch. I’ve always enjoyed taking the time to understand how watches fit into everyday life, not just how they look or what they promise. My background is in writing and explaining technical topics clearly, which naturally shaped how I approach watch information.

Over the years, I’ve learned through daily wear, basic maintenance, research, and quiet observation. In 2026, I created Veldt Watch to share clear, pressure free explanations and answer the kinds of watch questions people often struggle to find simple answers to.