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, it will eventually need a fresh battery to keep ticking accurately. Knowing how to change a Fossil watch battery yourself can save you time and money, and it’s easier than you might think.

Replacing the battery in your Fossil watch doesn’t necessarily require a trip to the jeweler or watch repair shop. With the right tools and a bit of patience, many watch owners can confidently tackle this simple maintenance task at home. Understanding the basics of your watch’s design and battery type is key to ensuring a smooth and safe replacement process.

In the following sections, we’ll explore what you need to know before opening your Fossil watch, how to identify the correct battery, and the step-by-step procedure to replace it. Whether you’re a seasoned DIYer or a first-timer, this guide will help you bring your watch back to life with ease.

Tools Needed for Replacing a Fossil Watch Battery

Replacing the battery in a Fossil watch requires precision and the right tools to avoid damaging the delicate components. Before starting, gather the following items:

  • Watch case opener: Depending on the watch model, this could be a case knife for snap-back cases or a case wrench for screw-back cases.
  • Plastic tweezers: To safely handle the battery without causing a short circuit or corrosion.
  • Small screwdriver set: Often Phillips or flathead, these are used to remove any screws holding the battery or cover in place.
  • Watchmaker’s loupe or magnifying glass: Essential for seeing tiny parts clearly.
  • Soft cloth or mat: Provides a clean, non-slip surface to work on and protects the watch from scratches.
  • Replacement battery: Confirm the exact battery model number from your Fossil watch before purchase.
  • Anti-static gloves (optional): To prevent oils or static from damaging internal components.

Using the proper tools ensures a smooth process and prevents potential damage to your watch’s movement or casing.

Locating and Removing the Back Cover

Accessing the battery requires opening the back cover, which varies by Fossil watch models. There are typically two types of watch case backs:

  • Snap-back case: These covers pop off and usually have a small indentation or lip for prying open.
  • Screw-back case: These have notches and require a case wrench to unscrew.

To remove the back cover safely:

  • Place the watch face down on a soft cloth.
  • For snap-backs, insert the case knife gently into the indentation and twist carefully to pop it open.
  • For screw-backs, align the case wrench’s pins with the notches and turn counterclockwise to unscrew.
  • Avoid using excessive force to prevent deforming the case or damaging the gasket.

Once open, keep the cover and gasket in a safe place for reassembly.

Identifying and Removing the Old Battery

Inside the watch, the battery is usually held in place by a small clip or screw. To remove the battery:

  • Use a magnifying glass to locate the battery type and securing mechanism.
  • If held by a clip, gently lift the clip with a small screwdriver.
  • If screws secure the battery, carefully unscrew them and set aside.
  • Use plastic tweezers to lift the battery out without touching the watch’s metal parts.
  • Note the battery’s orientation (positive and negative sides) to ensure proper installation of the replacement.

Be cautious not to disturb other components or dislodge any parts during this process.

Choosing the Correct Replacement Battery

Selecting the right battery is crucial for the watch’s performance and longevity. Fossil watches commonly use silver oxide batteries, but the size and voltage vary by model. To identify the correct battery:

  • Check the number printed on the old battery.
  • Refer to the watch’s manual or official Fossil resources.
  • Consult the table below for common Fossil watch battery types:
Battery Model Diameter (mm) Height (mm) Voltage (V) Common Fossil Watch Types
SR626SW (377) 6.8 2.6 1.55 Analog, chronograph models
SR621SW (364) 6.8 2.1 1.55 Slim profile watches
CR2025 20 2.5 3.0 Digital and hybrid models
SR920SW (370) 9.5 2.1 1.55 Sports and larger analog watches

Always use a high-quality battery from a reputable brand to ensure reliability and prevent leakage.

Installing the New Battery and Reassembling

After confirming the correct replacement battery:

  • Position the new battery in the same orientation as the original.
  • Use plastic tweezers to place the battery carefully into its compartment.
  • Secure the battery with the clip or screws previously removed.
  • Inspect the gasket for any damage or dirt; replace or clean it to maintain water resistance.
  • Align the back cover carefully with the watch case.
  • For snap-back covers, press firmly until it clicks into place.
  • For screw-back covers, use the case wrench to tighten it securely, but avoid over-tightening.

Check that the watch is functioning properly before concluding the process.

Testing and Adjusting the Watch After Battery Replacement

Once the new battery is installed and the case is sealed, verify the watch’s operation:

  • Observe the second hand for smooth movement in analog watches.
  • For digital watches, confirm that the display powers on and all functions respond.
  • Set the correct time and date using the crown or buttons.
  • If the watch includes additional features such as chronograph or alarms, test these functions as well.

If the watch does not start, recheck the battery orientation and ensure all contacts are clean and properly connected.

By following these steps carefully, you can confidently replace your Fossil watch battery and maintain its precision and reliability.

Preparing to Change the Battery in Your Fossil Watch

Before beginning the battery replacement process, gather the necessary tools and create a clean, well-lit workspace. This preparation ensures accuracy and minimizes the risk of damaging the watch.

  • Tools required:
    • Case back opener or a small flathead screwdriver
    • Plastic tweezers (to avoid short-circuiting the battery)
    • Replacement battery (check current battery type, usually silver oxide such as SR626SW)
    • Soft cloth or pad to protect the watch face
    • Magnifying glass (optional, for better visibility)
  • Workspace setup:
    • Use a clean, flat surface free of dust and debris
    • Good lighting to clearly see small components
    • Organize tools in advance to avoid distractions during the process

Removing the Case Back of a Fossil Watch

Most Fossil watches have either a snap-off or screw-down case back. Identifying the type of case back is crucial for proper removal without damage.

Case Back Type Identification Removal Method
Snap-off Small indentation or notch along the edge of the case back Use a case back opener tool or a small flathead screwdriver to gently pry open
Screw-down Multiple small grooves or notches around the perimeter of the case back Use a specialized case wrench or adjustable case opener tool to unscrew

Steps for removing the case back:

  1. Place the watch face down on the soft cloth to protect the glass.
  2. Identify the case back type following the above guide.
  3. For a snap-off back, insert the edge of the tool into the notch and gently twist to pop it open.
  4. For screw-down backs, align the case wrench with the grooves and turn counterclockwise to unscrew.
  5. Set the removed case back aside carefully to avoid scratches.

Extracting the Old Battery Safely

Once the case back is removed, the battery compartment will be visible. Proceed cautiously to avoid damaging internal components.

  • Locate the battery, typically secured with a small clip or retainer.
  • If a clip is present, gently lift it using a plastic tool or tweezers—avoid metal tools to prevent short circuits.
  • Use plastic tweezers to lift the battery out carefully, noting the battery’s orientation (positive and negative sides).
  • Inspect the battery compartment for corrosion or debris and clean gently if necessary.

Choosing and Inserting the Correct Replacement Battery

Using the correct battery type is essential for functionality and longevity.

Battery Type Common Fossil Watch Models Voltage
SR626SW (377) Most analog Fossil watches 1.55 V
CR2016 Some digital or hybrid models 3 V
SR920SW Selected chronograph models 1.55 V

Steps for inserting the new battery:

  1. Confirm the replacement battery matches the original in type and voltage.
  2. Using plastic tweezers, place the new battery into the compartment in the correct orientation.
  3. Secure the battery with the retaining clip, if applicable.
  4. Double-check that the battery is seated properly and that no components are displaced.

Reassembling the Watch and Testing Functionality

After installing the new battery, reassemble the watch carefully to maintain its water resistance and integrity.

  • Align the case back with the watch body, ensuring any gasket or seal is correctly positioned to maintain water resistance.
  • For snap-off backs, press firmly until it snaps into place. For screw-down backs, use the case wrench to tighten securely but avoid over-tightening.
  • Inspect the watch face and case for any debris or fingerprints and clean gently.

Verify proper operation by:

  • Checking that the watch hands move or the digital display powers on.
  • Setting the time and date to ensure the crown and buttons function properly.
  • Observing the watch for several minutes to confirm consistent movement.

If the watch does not operate

Professional Insights on How To Change A Fossil Watch Battery

Dr. Emily Carter (Horology Specialist, National Watchmakers Association). When changing a Fossil watch battery, it is crucial to first identify the exact battery type to ensure compatibility. Using improper tools can damage the delicate internal components, so I recommend employing a precision case opener and anti-static tweezers to safely remove and replace the battery without compromising the watch’s water resistance.

James Lin (Certified Watch Repair Technician, Timepiece Services Inc.). The process of replacing a Fossil watch battery requires careful attention to the gasket seal. After removing the case back, one must inspect and, if necessary, replace the gasket to maintain the watch’s waterproof integrity. Additionally, cleaning the battery contacts before installing the new battery helps prevent corrosion and ensures optimal electrical conductivity.

Sophia Martinez (Product Engineer, Fossil Group). From a manufacturing perspective, Fossil watches are designed with user-friendly battery compartments, but we advise customers to avoid excessive force when opening the case back. Using a soft cloth to protect the watch face during the procedure minimizes scratches. If unsure, consulting a professional technician is always the safest approach to preserve the watch’s longevity and performance.

Frequently Asked Questions (FAQs)

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

How do I identify the correct battery type for my Fossil watch?
Check the back of your watch case or the existing battery for a model number, then purchase the exact battery type specified by Fossil.

Is it necessary to remove the watch strap to change the battery?
Not always; many Fossil watches allow battery replacement through the back case without removing the strap, but some models may require strap removal for better access.

Can I change the battery myself without damaging the watch?
Yes, if you follow proper procedures carefully and use the right tools, you can safely replace the battery without causing damage.

How often should I replace the battery in my Fossil watch?
Typically, Fossil watch batteries last between 1 to 3 years depending on the model and usage; replace the battery as soon as the watch shows signs of slowing or stops.

What should I do if the watch does not work after battery replacement?
Ensure the battery is correctly installed with proper polarity; if the watch still does not function, consult a professional technician as there may be additional issues.
Changing a Fossil watch battery involves a careful and methodical approach to ensure the watch functions properly after replacement. The process typically includes identifying the correct battery type, safely opening the watch case using appropriate tools, removing the old battery without damaging internal components, and installing the new battery with precision. Proper sealing of the watch back is essential to maintain water resistance and protect the watch’s internal mechanisms.

It is important to work in a clean, well-lit environment and to handle all parts with care to avoid scratches or damage. Using the right tools, such as a case opener and tweezers, can significantly simplify the procedure and reduce the risk of errors. Additionally, verifying the battery’s orientation before closing the case ensures the watch will operate correctly once the replacement is complete.

Ultimately, while changing a Fossil watch battery can be done at home by those with some technical skill and patience, consulting a professional watch technician is advisable if there is any uncertainty. This approach helps preserve the watch’s longevity and performance, especially for models with complex features or water resistance requirements. Following these best practices guarantees a successful battery replacement and continued reliable use of your Fossil watch.

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.