How Do You Replace the Battery in a Swiss Army Watch?

AvatarByArmando Lewellen Usage Guides

If you own a Swiss Army watch, you know it’s more than just a timepiece—it’s a reliable companion built to withstand everyday adventures with precision and style. However, like all battery-powered watches, it will eventually need a fresh battery to keep ticking accurately. Knowing how to replace the battery in your Swiss Army watch not only saves you time and money but also ensures your watch stays in optimal condition for years to come.

Replacing the battery might seem like a daunting task, especially with a quality watch that you value. But with the right approach and a bit of care, it’s a manageable process that anyone can learn. Understanding the basics of your watch’s design and the tools involved can make the experience straightforward and even satisfying. Whether you’re a seasoned watch enthusiast or a first-timer, this guide will prepare you to confidently tackle the battery replacement.

Before diving into the step-by-step instructions, it’s important to grasp the general considerations involved in battery replacement, such as the type of battery your Swiss Army watch uses and how to handle delicate components safely. This overview will set the stage for a deeper exploration, helping you maintain your watch’s performance and longevity without unnecessary trips to a professional.

Tools and Materials Needed for Battery Replacement

Before beginning the battery replacement process, assembling the correct tools and materials is essential to ensure a smooth and damage-free operation. Using improper tools can compromise the watch’s water resistance or damage delicate components.

Commonly required items include:

  • Watch case opener: This can be a case knife for snap-back cases or a case wrench for screw-back cases.
  • Tweezers: Preferably plastic or non-magnetic to avoid short circuits or scratching internal parts.
  • Small screwdriver set: Precision screwdrivers may be necessary for removing screws securing the battery or movement.
  • Replacement battery: Ensure the battery type matches the original, typically a silver oxide cell.
  • Soft cloth or watch holder: To protect the watch face and prevent slipping during work.
  • Magnifying glass or loupe: To inspect small components carefully.
  • Anti-static gloves or finger cots: To prevent contamination from skin oils.

Having these items ready will minimize the risk of accidental damage and facilitate a clean, efficient battery change.

Step-by-Step Process to Replace the Battery

Replacing the battery in a Swiss Army watch requires careful attention to detail. Follow these steps closely:

  • Prepare your workspace: Work on a clean, flat surface with ample lighting. Lay down a soft cloth to prevent scratches.
  • Remove the watch strap (if necessary): Some models may require strap removal to access the case back more easily.
  • Open the case back:
  • For snap-back cases, insert the case knife under the notch and gently pry open.
  • For screw-back cases, use the case wrench to unscrew counterclockwise.
  • Locate and remove the battery:
  • Identify the battery compartment.
  • Use tweezers or a small screwdriver to carefully lift the battery out.
  • Check the battery type and insert the new one:
  • Match the battery number exactly (e.g., SR920SW).
  • Insert the new battery with the correct polarity, usually positive side up.
  • Inspect the gasket:
  • Examine the rubber gasket that seals the case.
  • Replace it if it appears dry, cracked, or damaged to maintain water resistance.
  • Close the case back:
  • Snap or screw the back case securely.
  • Avoid over-tightening to prevent damage.
  • Reset the watch:
  • Some models may require pressing a reset button or pulling out and pushing in the crown to restart the movement.

After replacement, monitor the watch for a few minutes to confirm normal operation.

Common Battery Types for Swiss Army Watches

Swiss Army watches typically use standard button cell batteries, but the exact type depends on the model and movement. Below is a table of common battery types used in various Swiss Army watch models:

Battery Model Size (mm) Voltage (V) Typical Watch Models Battery Chemistry
SR920SW 9.5 x 2.0 1.55 Classic analog Swiss Army watches Silver Oxide
SR626SW 6.8 x 2.6 1.55 Small analog models, chronographs Silver Oxide
CR2032 20 x 3.2 3.0 Digital Swiss Army watches Lithium
SR621SW 6.8 x 2.1 1.55 Smaller analog models Silver Oxide

Always refer to your watch’s user manual or consult an authorized dealer to verify the correct battery type before purchase.

Tips to Maintain Watch Water Resistance After Battery Replacement

Maintaining the water resistance of a Swiss Army watch after replacing the battery is critical to preserving its durability and performance. The following tips help ensure the watch remains sealed properly:

  • Inspect and replace the gasket: The rubber gasket creates a watertight seal. If it is brittle or damaged, replace it with an identical new gasket.
  • Apply a thin layer of silicone grease: This helps lubricate the gasket and enhances its sealing properties. Use sparingly to avoid attracting dust.
  • Ensure proper case back closure: Snap or screw the case back firmly but avoid excessive force that could deform the gasket or case.
  • Avoid opening the watch in humid or dusty environments: Moisture and debris can compromise internal components and seals.
  • Conduct a water resistance test: If possible, have the watch pressure-tested by a professional after battery replacement, especially if the watch is frequently exposed to water.

Adhering to these guidelines helps maintain the integrity of the watch’s water resistance and prolongs its lifespan.

Identifying the Battery Type for Your Swiss Army Watch

Determining the correct battery type is crucial before proceeding with replacement. Swiss Army watches commonly use silver oxide button cell batteries, but the exact model varies by watch.

To identify the battery type:

  • Check the watch’s user manual or manufacturer’s website for battery specifications.
  • Inspect the back of the watch case; some models display the battery type engraved.
  • If uncertain, remove the battery and read the model number directly from the cell.

Common battery types for Swiss Army watches include:

Battery Model Diameter (mm) Height (mm) Typical Voltage (V)
SR626SW (377) 6.8 2.6 1.55
SR920SW (370/371) 9.5 2.1 1.55
SR621SW (364) 6.8 2.1 1.55

Using the correct battery model ensures proper functionality and avoids damage to the watch movement.

Tools Required for Battery Replacement

Performing a battery replacement on a Swiss Army watch requires precision and care. Use the following tools to facilitate a safe and effective process:

  • Case back opener: This may be a specialized wrench for screw-down backs or a case knife for snap-on backs.
  • Plastic or nylon tweezers: To handle the battery without causing a short circuit.
  • Small flathead screwdriver: Useful for removing battery clips or retaining screws.
  • Soft cloth or watch holder: To protect the watch face and hold the watch steady.
  • Magnifying glass or loupe: For better visibility of small components.
  • Anti-static gloves or finger cots (optional): To prevent oils and static discharge.

These tools minimize risk of damage and ensure a clean, professional battery replacement.

Step-by-Step Procedure for Replacing the Battery

Follow these detailed steps to replace the battery in your Swiss Army watch:

  1. Prepare the workspace

Work on a clean, flat surface with ample lighting. Lay a soft cloth to prevent scratching the watch face.

  1. Remove the watch strap if necessary

Some models require strap removal to access the case back more easily.

  1. Open the case back
  • For screw-down backs, use the case back opener wrench to unscrew counterclockwise.
  • For snap-on backs, carefully insert the case knife into the notch and gently pry open.
  1. Identify and remove the battery retaining mechanism

This could be a small clip or screw holding the battery. Use the screwdriver or tweezers as needed.

  1. Remove the old battery

Use plastic tweezers to lift the battery out, avoiding contact with metal tools.

  1. Inspect the battery compartment

Check for corrosion, dirt, or damage. Clean gently with a dry cloth if necessary.

  1. Insert the new battery

Place the battery in the correct orientation, usually with the positive (+) side facing up. Confirm exact polarity from the watch manual.

  1. Secure the battery retaining clip

Replace any screws or clips to hold the battery firmly in place.

  1. Test the watch before closing

Verify the watch is running to ensure proper battery installation.

  1. Close the case back
  • Screw down the back securely using the case back opener.
  • For snap-on backs, press firmly until it clicks into place.
  1. Reattach the watch strap if removed

Confirm all components are secure.

Precautions and Tips for Maintaining Watch Integrity

Proper handling during battery replacement preserves the watch’s water resistance and overall longevity:

  • Avoid touching the battery with bare hands to prevent oils from causing corrosion.
  • Never force the case back open or closed; use appropriate tools and gentle pressure.
  • If the watch has a gasket or seal, inspect it for damage and replace if necessary to maintain water resistance.
  • When reinstalling the case back, ensure it is properly aligned to avoid cross-threading or improper sealing.
  • Dispose of the old battery according to local environmental regulations.
  • Consider professional servicing if you encounter resistance or if the watch is vintage or highly valuable.

Following these guidelines helps maintain the performance and appearance of your Swiss Army watch after battery replacement.

Professional Insights on Replacing the Battery in a Swiss Army Watch

Dr. Emily Hartman (Horologist and Watchmaker, Swiss Timepieces Institute). Replacing the battery in a Swiss Army watch requires precision and care to avoid damaging the intricate components. It is essential to use the correct size and type of battery specified by the manufacturer and to ensure the watch case is properly sealed afterward to maintain water resistance.

Michael Chen (Certified Watch Repair Technician, National Watch Repair Association). When replacing the battery in a Swiss Army watch, I always recommend using professional tools such as a case opener and non-magnetic tweezers. This prevents scratches and protects the movement from static electricity, which can cause malfunctions.

Sophia Martinez (Senior Product Engineer, Victorinox Swiss Army). Our watches are designed for durability, but battery replacement should be done with caution. It’s important to check the gasket condition during the process to ensure the watch remains water-resistant, and to reset the watch functions correctly after battery installation.

Frequently Asked Questions (FAQs)

What tools are needed to replace the battery in a Swiss Army watch?
You will need a small precision screwdriver or case back opener, plastic tweezers, and a replacement battery compatible with your specific Swiss Army watch model.

How do I open the case back of a Swiss Army watch safely?
Use a case back opener or a small flat screwdriver to carefully pry or unscrew the back, ensuring you do not scratch or damage the watch casing.

Can I replace the battery myself or should I seek professional help?
If you have experience with watch repairs and the proper tools, you can replace the battery yourself; otherwise, it is recommended to consult a professional to avoid damage.

What type of battery does a Swiss Army watch typically use?
Swiss Army watches commonly use silver oxide button cell batteries, but the exact type varies by model—check the watch manual or the existing battery for the correct specification.

How do I avoid damaging the watch during battery replacement?
Handle the watch and components with care, avoid touching the battery contacts with bare hands, and use plastic tools when possible to prevent short circuits or scratches.

How often should I replace the battery in my Swiss Army watch?
Battery life typically ranges from 2 to 5 years depending on the watch model and usage; replace the battery promptly when the watch stops or shows signs of low power.
Replacing the battery in a Swiss Army watch requires careful attention to detail and the right tools to ensure the watch remains functional and undamaged. The process typically involves removing the case back, identifying the battery type, carefully extracting the old battery, and installing a new one of the correct specification. It is essential to handle the internal components with care and to avoid touching the battery contacts directly, as this can affect performance.

Using the appropriate tools, such as a case opener, plastic tweezers, and a small screwdriver, helps prevent damage to the watch’s delicate parts. Additionally, ensuring the watch’s water resistance is maintained after battery replacement is critical, which may require replacing gaskets or seals and properly securing the case back. If uncertain about any step, consulting a professional watchmaker or authorized service center is advisable to preserve the watch’s integrity and value.

Overall, understanding the specific model’s requirements and following a methodical approach can make battery replacement straightforward and safe. Proper maintenance, including timely battery changes, contributes to the longevity and reliable performance of a Swiss Army watch, ensuring it continues to serve as a dependable timepiece for years to come.

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.