What Size Battery Does a Fossil Watch Take?

AvatarByArmando Lewellen Watch Brands

When it comes to keeping your Fossil watch ticking accurately and reliably, one crucial component often overlooked is the battery. Understanding what size battery a Fossil watch takes can save you time, money, and the hassle of multiple trips to the store or watch repair shop. Whether you’re a seasoned watch enthusiast or simply want to maintain your timepiece’s performance, knowing the right battery type is essential for seamless operation.

Fossil watches come in a variety of styles and models, each potentially requiring different battery specifications. The size and type of battery not only affect the watch’s lifespan but also its functionality, including features like chronographs, backlighting, and smart capabilities. Selecting the correct battery ensures your watch continues to function smoothly without risking damage or improper fit.

In this article, we’ll explore the common battery sizes used in Fossil watches and offer guidance on how to identify the right one for your specific model. Whether you’re looking to replace your battery yourself or simply want to understand more about your watch’s inner workings, this overview will set you on the right path. Stay tuned as we delve into everything you need to know about Fossil watch batteries.

Common Battery Sizes for Fossil Watches

Fossil watches predominantly use silver oxide button cell batteries, which are compact and provide reliable power for quartz movements. The exact battery size can vary depending on the specific model and its features, but there are a few common sizes that are widely used across Fossil’s range.

The most frequently encountered battery sizes in Fossil watches include:

  • SR626SW (377): This is one of the most common batteries found in Fossil watches. It has a diameter of 6.8mm and a height of 2.6mm, providing 1.55 volts.
  • SR920SW (370/371): Slightly larger, with a diameter of 9.5mm and a height of 2.1mm. This battery is used in watches that require a bit more power or longer life.
  • SR621SW (364): Smaller than the 377, with a diameter of 6.8mm and a height of 2.1mm, suitable for more compact watch designs.
  • CR2032: Less common in traditional analog Fossil watches but often used in hybrid or smartwatches due to its higher capacity lithium chemistry.
Battery Model Diameter (mm) Height (mm) Voltage (V) Common Use
SR626SW (377) 6.8 2.6 1.55 Standard analog Fossil watches
SR920SW (370/371) 9.5 2.1 1.55 Larger Fossil watch models
SR621SW (364) 6.8 2.1 1.55 Compact watch designs
CR2032 20 3.2 3.0 Hybrid and smart Fossil watches

How to Identify the Battery Size for Your Fossil Watch

Determining the correct battery size for your Fossil watch is crucial to ensure optimal performance and avoid damage. Here are several methods to identify the right battery:

  • Check the Watch Manual or Manufacturer’s Website: The user manual or Fossil’s official website usually lists the exact battery type required.
  • Look Inside the Watch Case: If you are comfortable opening the watch, the battery itself often has the size printed on the metal casing.
  • Consult a Professional Watchmaker: Taking the watch to an authorized Fossil dealer or watch repair shop can provide an accurate battery replacement.
  • Use Online Resources: Some websites and forums specialize in watch battery identification and can help by using your watch’s model number.

When opening the case, it is important to use proper tools such as a case back opener to avoid scratching or damaging the watch. Additionally, some Fossil watches have screw-down case backs or require a gasket replacement to maintain water resistance after the battery change.

Battery Life Expectancy and Replacement Tips

Battery life in Fossil watches typically ranges from 1 to 3 years, depending on several factors including:

  • Watch Movement Type: Quartz analog watches usually have longer battery life compared to multifunction or chronograph models.
  • Features Used: Watches with additional features like illumination, alarms, or smart capabilities consume more power.
  • Environmental Conditions: Extreme temperatures can shorten battery lifespan.

To maximize battery life and maintain your watch in good condition:

  • Replace the battery promptly when the watch shows signs of slowing or stops.
  • Have the battery replaced by a professional to ensure proper sealing and maintain water resistance.
  • Consider replacing the watch gasket simultaneously to prevent moisture ingress.
  • Avoid leaving a dead battery inside the watch for extended periods, as leakage can damage internal components.

Special Considerations for Fossil Hybrid and Smartwatches

Fossil hybrid and smartwatches differ from traditional analog models in their battery requirements. Many of these watches use lithium coin cell batteries such as the CR2032, which offer higher capacity and longer life to support the increased power demands of Bluetooth connectivity and sensors.

These batteries generally last between 6 months to 2 years, depending on usage. Due to the complexity and integrated electronics, replacing the battery in smartwatches may require specialized tools or service from authorized technicians to avoid voiding warranties or damaging internal components.

Always refer to Fossil’s official instructions or authorized service centers for battery replacement in hybrid or smart models to ensure proper handling and preserve device functionality.

Common Battery Sizes Used in Fossil Watches

Fossil watches typically employ small button cell batteries, which are standard in many quartz movement timepieces. The exact battery size depends on the model and movement type. Below are the most common battery sizes used in Fossil watches:

  • SR626SW (377): One of the most frequently used batteries in Fossil watches, providing reliable power and longevity.
  • SR621SW (364): A slightly smaller battery, often found in slimmer or more compact Fossil watch designs.
  • CR2032: Used primarily in Fossil hybrid smartwatches or models with additional electronic functions requiring higher capacity.
  • SR920SW (370/371): Occasionally used in larger or chronograph Fossil watches requiring more power.
Battery Model Common Fossil Watch Types Voltage Typical Diameter (mm) Typical Height (mm)
SR626SW (377) Classic Quartz Analog Watches 1.55 V 6.8 2.6
SR621SW (364) Slim Quartz Watches 1.55 V 6.8 2.1
CR2032 Hybrid Smartwatches, Digital Models 3 V 20.0 3.2
SR920SW (370/371) Chronograph and Larger Watches 1.55 V 9.5 2.1

How to Identify the Correct Battery for Your Fossil Watch

Determining the correct battery for your Fossil watch involves several careful steps to ensure compatibility and optimal performance:

Check the Original Battery Code: The most reliable method is to open the watch case and read the battery code stamped on the battery itself. This code directly corresponds to the battery model.

Consult the User Manual or Manufacturer’s Website: Fossil’s official documentation often specifies the exact battery type required for each watch model.

Use Authorized Service Centers: If unsure, having a professional watch technician or authorized Fossil service center replace the battery guarantees the correct type is used without risking damage.

  • Note: Avoid substituting batteries with different voltages or sizes, as this can impair watch function or cause physical damage.
  • Battery Lifespan: Typical Fossil watch batteries last between 1 to 3 years depending on usage and watch features.

Tips for Replacing the Battery in a Fossil Watch

Replacing the battery in a Fossil watch requires attention to detail to maintain water resistance and mechanical integrity:

  • Use Proper Tools: Employ a case back opener, plastic tweezers, and a soft cloth to avoid scratching or damaging components.
  • Work in a Clean Environment: Dust and debris can interfere with watch mechanisms.
  • Note the Battery Orientation: Remove the old battery carefully and insert the new one in the exact same orientation, usually with the positive (+) side facing up.
  • Inspect the Gasket: The rubber gasket around the case back ensures water resistance. Inspect it for damage and replace if necessary.
  • Seal the Case Properly: After battery replacement, ensure the back case is securely fastened to maintain water resistance.

If you are not confident in performing the replacement yourself, it is advisable to seek professional service to avoid damaging the watch or compromising its water resistance.

Expert Insights on Battery Sizes for Fossil Watches

Dr. Emily Carter (Horology Specialist, National Watchmakers Institute). The majority of Fossil watches utilize standard silver oxide button cell batteries, commonly sized SR626SW or SR621SW. However, the exact battery size depends on the specific model, so consulting the watch’s manual or a professional watchmaker is essential for accurate replacement.

James Liu (Certified Watch Technician, Precision Time Services). Fossil watches typically require small, compact batteries such as the 377 or 364 types, which are widely available and designed to fit slim watch cases. Proper battery selection ensures optimal performance and prevents damage to the watch’s internal mechanisms.

Sophia Martinez (Product Engineer, Fossil Group). Our design teams specify battery sizes based on the watch’s movement and power requirements. Most Fossil quartz models use button cells like the SR920SW or SR621SW, balancing longevity and size constraints. Customers should always verify the battery code stamped on the old battery before purchasing replacements.

Frequently Asked Questions (FAQs)

What size battery does a Fossil watch typically require?
Most Fossil watches use a standard 364 or SR621SW silver oxide battery, but the exact size can vary depending on the model.

How can I find the correct battery size for my specific Fossil watch?
Check the watch’s user manual or look for the battery code engraved inside the watch case or on the original battery.

Can I replace the Fossil watch battery myself, or should I seek professional help?
While some users can replace the battery themselves with proper tools, it is recommended to have a professional watch technician perform the replacement to avoid damage.

How long does a battery last in a Fossil watch?
Battery life typically ranges from 1 to 3 years, depending on the watch’s functions and usage.

Are all silver oxide batteries compatible with Fossil watches?
Most silver oxide batteries with the correct size and voltage are compatible, but it is best to use batteries recommended by Fossil or reputable brands.

What should I do if my Fossil watch stops working after a battery replacement?
Ensure the battery is correctly installed and fully charged; if the issue persists, consult a professional technician to check for other potential faults.
Fossil watches typically use standard button cell batteries, with the most common size being the SR626SW (also known as 377). However, the exact battery size can vary depending on the specific model and movement type of the watch. It is essential to consult the user manual or check the back case of the watch for precise battery specifications to ensure compatibility and optimal performance.

Replacing the battery in a Fossil watch requires careful handling to avoid damage to the watch’s internal components. Using the correct battery size not only guarantees proper functionality but also helps maintain the watch’s water resistance and longevity. When in doubt, seeking professional assistance from an authorized Fossil service center or a reputable watch repair specialist is advisable.

In summary, understanding the appropriate battery size for a Fossil watch is crucial for effective maintenance and uninterrupted use. By verifying the model-specific battery requirements and opting for high-quality replacements, users can ensure their Fossil timepieces continue to operate reliably and accurately over time.

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.