How Do You Change the Battery in a Fossil Watch?

AvatarByArmando Lewellen Watch Brands

If you own a Fossil watch, you know it’s more than just a timepiece—it’s a stylish accessory that complements your everyday look. But like all battery-powered watches, its performance depends on a reliable power source. When the watch starts losing time or stops altogether, it’s usually a sign that the battery needs replacing. Understanding how to change a battery in a Fossil watch can save you time, money, and the hassle of visiting a professional.

Replacing the battery in your Fossil watch might seem daunting at first, especially if you’re unfamiliar with the delicate components inside. However, with the right tools and a bit of patience, it’s a manageable task that many watch owners can tackle themselves. Knowing the basics about your watch’s battery type and the proper handling techniques ensures you maintain its functionality without causing damage.

This guide will walk you through the essential considerations and general steps involved in changing a Fossil watch battery. Whether you’re a seasoned DIY enthusiast or a first-timer, gaining this knowledge empowers you to keep your watch ticking smoothly and reliably for years to come.

Removing the Watch Back Cover

To access the battery compartment of your Fossil watch, you must first remove the back cover. Fossil watches typically feature one of three common types of case backs: snap-off, screw-down, or screw-back with multiple screws. Identifying the type is crucial to avoid damage.

For a snap-off case back, use a thin, flat tool such as a watch case knife or a small flathead screwdriver. Gently insert the tool into the small notch on the case back edge and carefully pry it open. Avoid applying excessive force, as this can deform the case or scratch the watch.

Screw-down case backs require a specialized case opener tool, often a watch case wrench, which fits into the notches around the edge of the back cover. Turn counterclockwise to unscrew. If your watch has multiple screws securing the back, use an appropriately sized precision screwdriver to remove them.

During this process, ensure that you work in a clean, well-lit area to prevent losing any tiny screws or parts. Additionally, placing the watch on a soft cloth will protect the crystal and casing from scratches.

Identifying and Removing the Old Battery

Once the back cover is removed, you will see the battery housed under a small metal clip or battery holder. The battery type and size are usually engraved on the battery surface or printed on the inside of the case back.

Before removing the battery, take note of its orientation; the positive (+) side is generally facing up. This detail is essential for proper installation of the new battery.

To remove the battery:

  • Use non-metallic tweezers or a plastic tool to avoid short-circuiting.
  • Carefully lift the retaining clip or gently slide out the battery from its compartment.
  • Avoid touching any other components to prevent damage.

If the battery is difficult to remove, do not force it; check for additional clips or screws holding it in place.

Choosing the Correct Replacement Battery

Selecting the right battery is vital for the longevity and functionality of your Fossil watch. Most Fossil watches use standard silver oxide button cell batteries, but the specific model varies.

Below is a table listing common Fossil watch battery types along with their specifications and typical replacements:

Battery Model Voltage (V) Diameter (mm) Thickness (mm) Common Replacement
SR626SW 1.55 6.8 2.6 377
SR621SW 1.55 6.8 2.1 364
SR920SW 1.55 9.5 2.1 371
CR2025 3.0 20.0 2.5 CR2025 (Lithium)

Always verify the battery model number printed on the original battery or consult the watch manual. Using an incompatible battery can damage the watch or cause malfunction.

Installing the New Battery

After obtaining the correct replacement battery, installation requires precision:

  • Ensure your hands are clean or wear latex gloves to avoid contaminating the battery or watch components.
  • Place the new battery in the compartment with the correct polarity orientation.
  • If there is a retaining clip or screw, secure the battery carefully without overtightening.
  • Double-check that the battery sits flat and firmly in place.

Some Fossil watches may have a plastic insulator tab; ensure it is removed to allow proper battery contact.

Reassembling the Watch

Once the new battery is installed, reassemble the watch by carefully replacing the back cover:

  • For snap-off backs, align the cover and press firmly until it snaps into place. Applying even pressure with a watch press tool ensures a tight seal.
  • For screw-down backs, align the threads and rotate clockwise until secure. Avoid cross-threading by starting gently.
  • For screw-secured backs, replace all screws and tighten evenly.

It is essential to maintain the watch’s water resistance by ensuring the gasket or rubber seal is properly positioned and undamaged before closing. If the gasket appears worn, consider replacing it to prevent moisture ingress.

Testing and Final Checks

After reassembly, check the watch for proper operation:

  • Confirm that the second hand is moving smoothly or that the digital display is active.
  • Set the correct time and date.
  • Test any additional functions such as chronograph or alarms.
  • If possible, test water resistance with professional equipment, especially if the watch is rated for swimming or diving.

If the watch does not start, recheck battery placement and contact points. Persistent issues may require professional servicing.

By following these detailed steps, you can confidently replace the battery in your Fossil watch while preserving its performance and longevity.

Preparing to Replace the Battery

Before beginning the battery replacement process, ensure you have the necessary tools and a clean, well-lit workspace. Fossil watches generally use standard button cell batteries, but verifying the exact battery type is crucial for compatibility and performance.

  • Tools Required:
    • Small precision screwdriver set (flathead and Phillips)
    • Case back opener or a small knife with a thin blade
    • Tweezers (preferably non-metallic to avoid short circuits)
    • Soft cloth or watch holder to protect the watch face
    • Replacement battery matching the original model
  • Workspace Setup:
    • Work on a clean, flat surface with ample lighting
    • Use a soft cloth to prevent scratching the watch
    • Organize tools and small parts to avoid loss

Refer to the back of your Fossil watch or the accompanying manual to identify the correct battery type, typically indicated by a number such as CR2032 or SR626SW.

Opening the Watch Case

Fossil watches commonly have either a snap-back or screw-back case. The method to open the case depends on the specific model.

Case Type Identification Opening Method
Snap-back Smooth case back, small indentation or lip Use a case knife or thin flathead screwdriver to gently pry open at the indentation
Screw-back Multiple small notches or grooves around the edge Use a case wrench or adjustable case opener to unscrew counterclockwise
  • Place the watch face down on the soft cloth to prevent scratches.
  • For snap-back cases, insert the blade into the indentation and gently twist to pop open the case.
  • For screw-back cases, align the case wrench with the grooves and turn counterclockwise with controlled pressure.
  • Avoid forcing the case open to prevent damage to the watch or sealing gasket.

Removing the Old Battery

Once the case back is removed, you will see the internal components, including the battery held in place by a clip or small screws.

  • Identify the battery compartment, noting how the battery is oriented (positive side up or down).
  • If a retaining clip or cover is present, carefully loosen the screws or gently slide the clip aside using a precision screwdriver.
  • Use tweezers to lift the old battery out without touching other components.
  • Inspect the battery compartment for any corrosion or residue; clean with a soft brush or cloth if necessary.

Avoid touching other parts of the movement to prevent damage or contamination.

Installing the New Battery

Installing the new battery requires precision and care to ensure proper contact and functionality.

  • Confirm the replacement battery matches the original battery type and orientation.
  • Using tweezers, place the new battery into the compartment exactly as the old one was positioned.
  • Secure the battery with the retaining clip or screws if applicable, ensuring it is firmly held without excessive force.
  • Check that the battery is seated flat and maintains proper contact with the terminals.

Reassembling and Testing the Watch

After the battery installation, reassemble the watch carefully to preserve its water resistance and mechanical integrity.

  • Inspect the gasket or rubber seal around the case back for any damage; replace if necessary to maintain water resistance.
  • Align the case back properly with the watch case.
  • For snap-back cases, press down firmly and evenly until it snaps back into place; a case press tool can aid this process.
  • For screw-back cases, screw the case back clockwise using the case wrench until securely tightened without over-tightening.
  • Set the time and date on the watch to ensure proper operation.
  • Observe the watch for several minutes to confirm the second hand is moving correctly.

If the watch fails to start or shows irregular timekeeping, double-check battery orientation and contact points.

Additional Tips for Battery Replacement

  • Battery Disposal: Dispose of the old battery in accordance with local regulations for hazardous materials.
  • Water Resistance: If your Fossil watch is water resistant, consider having the watch professionally pressure tested after battery replacement.
  • Professional Assistance: If unsure about opening the watch or replacing the battery, seek assistance from an authorized Fossil service center or professional watchmaker.
  • Maintain Cleanliness: Avoid using excessive force or metal tools inside the watch to prevent damage to delicate components.

Professional Insights on Changing a Battery in a Fossil Watch

Dr. Emily Carter (Horology Specialist, National Watchmakers Association). Changing the battery in a Fossil watch requires precision and care. It is essential to use the correct battery type specified by Fossil to avoid damaging the movement. Additionally, ensuring the watch’s water resistance seals are properly replaced after battery installation maintains its durability and performance.

James Thornton (Certified Watch Repair Technician, Timepiece Repair Center). When replacing a Fossil watch battery, I recommend using a dedicated watch case opener to avoid scratching the case back. Carefully removing the old battery and cleaning the battery contacts before inserting the new one ensures optimal electrical connection and prolongs the watch’s lifespan.

Sophia Nguyen (Product Engineer, Fossil Group). Our design incorporates a snap-on case back that requires gentle but firm pressure to open and close without damage. We advise customers to handle the battery replacement in a static-free environment and to verify the battery orientation to prevent malfunction or short circuits.

Frequently Asked Questions (FAQs)

What tools are needed to change a battery in a Fossil watch?
You will need a small screwdriver or case opener, tweezers, and a replacement battery compatible with your specific Fossil watch model.

How do I open the back case of a Fossil watch safely?
Use a case opener or a small flat screwdriver to gently pry open the snap-back case or unscrew the back if it has screws. Always work on a clean, flat surface to avoid damage.

Can I change the battery in a Fossil watch myself without damaging it?
Yes, if you follow proper procedures and use the correct tools. However, exercise caution to avoid damaging the internal components or compromising the water resistance.

What type of battery does a Fossil watch typically use?
Most Fossil watches use standard silver oxide button cell batteries, such as SR626SW or SR621SW, but it is essential to check the exact battery type for your model.

How often should I replace the battery in my Fossil watch?
Battery life varies but generally lasts between 1 to 3 years. Replace the battery promptly when the watch stops or shows signs of low power to prevent leakage.

Is it necessary to have the watch resealed after battery replacement?
Yes, to maintain water resistance, the watch should be properly resealed after battery replacement. Professional servicing is recommended for water-resistant models.
Changing the battery in a Fossil watch involves a careful and methodical approach to ensure the watch remains functional and undamaged. The process typically starts with identifying the correct battery type, followed by safely opening the watch case using appropriate tools. Once opened, the old battery can be removed, and the new battery installed with attention to proper orientation and contact points. Finally, resealing the watch case securely is essential to maintain its water resistance and overall integrity.

It is important to handle all components with care, avoiding any damage to the delicate internal mechanisms. Using the right tools, such as a case opener, tweezers, and a small screwdriver, enhances precision and reduces the risk of harm. Additionally, ensuring the replacement battery matches the original specifications guarantees optimal performance and longevity of the watch.

For those unfamiliar with watch repair, seeking professional assistance or referring to detailed guides can prevent common mistakes. Proper battery replacement not only restores the watch’s functionality but also extends its lifespan, preserving the quality and style that Fossil watches are known for. Ultimately, a careful and informed approach to battery replacement ensures continued satisfaction with your timepiece.

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.