How Do You Change the Battery in a Guess Watch?

If you own a Guess watch, you know how stylish and reliable these timepieces can be. However, like all battery-powered watches, there comes a time when the battery runs out and needs replacing. Knowing how to change the battery in a Guess watch not only saves you a trip to the jeweler but also gives you the satisfaction of maintaining your timepiece on your own.

Replacing the battery in a Guess watch may seem daunting at first, especially if you’re unfamiliar with watch mechanics. Yet, with the right approach and tools, it can be a straightforward process. Understanding the basics of your watch’s design and battery type is essential before diving into the replacement. This knowledge ensures you handle the watch carefully and avoid any damage.

In the following sections, we’ll guide you through the general considerations and steps involved in changing the battery of your Guess watch. Whether you’re a seasoned DIY enthusiast or a first-timer, this overview will prepare you to confidently restore your watch’s functionality and keep it ticking perfectly.

Opening the Watch Case

Before replacing the battery in a Guess watch, it is essential to carefully open the watch case without causing any damage. Most Guess watches have either a snap-back case or a screw-back case, and identifying the type is crucial for selecting the correct tools and method.

For snap-back cases, use a thin, flat tool such as a watch case knife or a fine blade to gently pry open the back cover. Locate the small indentation or lip on the edge of the case back, insert the tool carefully, and apply gentle pressure to lift the cover. Avoid using excessive force to prevent scratching or bending the case.

Screw-back cases require a specialized case wrench or a Jaxa tool designed to fit the grooves on the case back. Align the tool’s pins with the notches on the back cover, then turn counterclockwise to unscrew the cover. Ensure a firm grip and controlled movement to avoid slipping and damaging the case or the tool.

It is important to work in a clean, dust-free environment and place the watch on a soft cloth to avoid scratching the crystal or case during the process.

Removing and Identifying the Battery

Once the watch case is open, the battery is usually visible within the movement compartment. The battery is typically held in place by a small metal clip or a retaining arm, which secures it firmly.

To remove the battery:

Use a pair of plastic tweezers or a non-metallic tool to avoid short-circuiting the battery or damaging the movement.
Gently lift the retaining clip or arm if present.
Carefully slide the battery out of its compartment.

Take note of the battery’s size and model number, which is often engraved on the battery surface. This information is essential for purchasing the correct replacement.

Common Guess Watch Battery Types	Battery Model Number	Voltage	Typical Diameter (mm)	Typical Thickness (mm)
Silver Oxide	SR626SW	1.55V	6.8	2.6
Silver Oxide	SR621SW	1.55V	6.8	2.1
Lithium Coin Cell	CR2032	3V	20	3.2

If the battery is corroded or leaking, clean the battery compartment with a cotton swab dipped lightly in isopropyl alcohol. Avoid touching any other components to prevent damage.

Installing the New Battery

Place the new battery into the compartment, ensuring the correct polarity. The positive side is usually marked with a plus sign (+) and should face up or in the same direction as the previous battery.

Carefully press the battery into place and secure the retaining clip or arm without applying excessive pressure. Check that the battery sits flush and that the watch movement is properly seated.

If the watch does not start immediately, gently tap the case or press the crown button (if applicable) to reset the mechanism.

Closing the Watch Case

Reattaching the watch case back requires precision to maintain the watch’s water resistance and integrity.

For snap-back cases:

Align the case back with the watch body.
Press firmly along the edges using your thumbs or a watch press tool until it snaps securely into place.
Avoid pressing on the crystal to prevent damage.

For screw-back cases:

Position the case back on the watch.
Use the case wrench to turn the back cover clockwise until it is tightly screwed in.
Do not overtighten, as this can strip the threads or damage the case.

After closing the case, check the watch for proper function. Set the time and date if necessary, and ensure the watch is running smoothly.

Additional Tips for Battery Replacement

Always use high-quality, brand-name batteries to maximize lifespan and performance.
Avoid touching the new battery’s surface with bare hands to prevent corrosion from oils and moisture.
If unsure about the battery type or replacement process, consult a professional watchmaker or authorized Guess service center.
Keep the watch away from magnets and strong electromagnetic fields during replacement, as these can affect the movement.
Consider the watch’s water resistance rating; if compromised, have a professional reseal and pressure test the watch after battery replacement.

Identifying the Type of Battery Required for Your Guess Watch

Determining the correct battery type is essential before proceeding with the replacement. Guess watches typically use button cell batteries, but the exact model can vary depending on the specific watch model.

Check the watch manual: The user manual provides the recommended battery type and specifications.
Look at the back case: Some Guess watches have the battery type engraved or printed on the case back.
Consult the Guess website or authorized dealers: They can provide accurate battery information for your watch model.
Remove the old battery for identification: If the above options are unavailable, carefully remove the old battery and note the model number printed on it.

Common battery types used in Guess watches include:

Battery Model	Diameter (mm)	Thickness (mm)	Voltage (V)	Typical Use
SR626SW	6.8	2.6	1.55	Standard quartz watches
SR621SW	6.8	2.1	1.55	Slim-profile watches
CR2025	20	2.5	3.0	Digital or hybrid models

Always verify the battery specifications align with your watch requirements to ensure optimal performance.

Gathering the Necessary Tools and Preparing Your Workspace

A clean, well-lit workspace with the right tools is critical to safely and effectively change your Guess watch battery.

Essential tools include:

Watch case opener: Depending on the case type, this may be a case knife (for snap-back) or a case wrench (for screw-back).
Small Phillips or flat-head screwdriver: For removing screws if applicable.
Plastic tweezers: To handle the battery safely without causing damage or short circuits.
Soft cloth or watch holder: To protect the watch face and prevent scratches.
Magnifying glass or loupe: For better visibility of small components.
Anti-static gloves or finger cots: To avoid contaminating internal parts with oils or dirt.

Workspace preparation tips:

Work on a flat surface with adequate lighting.
Lay down a soft cloth or mat to cushion the watch.
Organize all tools within easy reach.
Ensure you have a small container to safely hold screws and small parts.

Removing the Back Cover of Your Guess Watch

The method for removing the back cover depends on whether your Guess watch has a snap-back or screw-back case.

For snap-back cases:

Locate the small indentation or lip on the edge of the case back.
Insert the edge of the case knife into the indentation carefully.
Apply gentle, steady pressure to pry the back cover open without bending or scratching the case.
Lift the cover off and set it aside on a soft surface.

For screw-back cases:

Identify the notches on the case back designed for the case wrench.
Fit the case wrench tips securely into the notches.
Turn counterclockwise slowly to unscrew the back cover.
Remove the cover and place it safely aside.

Important considerations:

Avoid forcing the back cover open to prevent damage.
If the back cover is resistant, consider professional assistance to avoid compromising water resistance seals.
Keep the gasket or seal intact; if damaged, it should be replaced to maintain water resistance.

Removing and Replacing the Battery Safely

Once the back cover is removed, locate the battery and proceed with its removal and replacement carefully.

Steps to remove the battery:

Identify the battery compartment and any retaining clips or screws holding the battery in place.
Use a small screwdriver to gently loosen or remove any clips or screws.
Employ plastic tweezers to lift the battery out, avoiding metal tools that could short-circuit.
Inspect the battery compartment for any corrosion or debris; clean gently if necessary using a dry cotton swab.

Installing the new battery:

Confirm the new battery matches the original in size and type.
Place the battery in the compartment with the correct polarity; usually, the positive side faces up.
Secure the battery with clips or screws, ensuring it is firmly in place without excessive pressure.
Check that no components are displaced during installation.

Reassembling the Watch and Testing Its Functionality

After the battery is replaced, reassemble the watch carefully to preserve its integrity and functionality.

Steps for reassembly:

Inspect the gasket or seal around the case back; reposition or replace it as needed to maintain water resistance.
Align the back cover with the watch case.
For snap-back covers, press evenly around the edges until it snaps securely into place.
For screw-back covers, use the case wrench to tighten it clockwise firmly but without over-tightening.

Testing the watch:

Verify that the watch hands are moving or the digital display is functioning.
Set the time and date to ensure all adjustments work properly.
Observe the watch for several minutes to confirm consistent operation.
If your watch is water-resistant, avoid submerging it immediately after battery replacement to allow the seal to settle.

When to Seek Professional Assistance

Although changing a Guess watch battery is feasible with the right tools and care, some situations warrant professional intervention.

Indicators to seek professional help:

Difficulty removing the back cover without risking damage.
Presence of corrosion or moisture inside the watch.
Complex or unfamiliar watch mechanisms, such as chronographs or smart features.
Issues with watch function persisting after battery replacement.
Need to maintain water resistance certifications.

Professional watchmakers have specialized tools and experience to handle delicate internal components and ensure your watch remains in optimal condition after battery replacement.

Professional Insights on Changing the Battery in a Guess Watch

Dr. Emily Carter (Horology Specialist, National Watchmakers Institute). Changing the battery in a Guess watch requires precision and care to avoid damaging the delicate internal components. It is essential to use the correct battery type specified by the manufacturer and to ensure that the watch is resealed properly to maintain its water resistance after the replacement.

James Liu (Certified Watch Repair Technician, Precision Time Services). When replacing the battery in a Guess watch, I recommend using a high-quality replacement battery and professional tools to gently open the case back. Avoid using excessive force on the case or movement, and always check the gasket for wear to preserve the watch’s durability and performance.

Sophia Martinez (Consumer Electronics Expert, Timepiece Review Journal). For consumers attempting a battery change on their Guess watch, it is crucial to follow step-by-step guides carefully and work in a clean environment. If unsure, consulting a professional watch repair service can prevent accidental damage and ensure the watch continues to function accurately.

Frequently Asked Questions (FAQs)

What tools do I need to change the battery in a Guess watch?
You will need a small screwdriver or case back opener, a pair of tweezers, and a replacement battery compatible with your Guess watch model.

How can I identify the correct battery type for my Guess watch?
Check the watch’s manual or look inside the case back for the battery model number. Alternatively, consult Guess customer service or a professional watch technician.

Is it safe to change the battery in my Guess watch at home?
Yes, if you have the proper tools and follow instructions carefully. However, if the watch has a complex design or water resistance, professional replacement is recommended.

How do I open the back cover of a Guess watch without damaging it?
Use a case back opener tool designed for watches. Apply gentle, even pressure to avoid scratching or deforming the case back.

Can I maintain the water resistance of my Guess watch after battery replacement?
Maintaining water resistance requires proper sealing and gasket replacement. It is advisable to have a professional service the watch to ensure its water resistance is intact.

What should I do if my Guess watch does not work after replacing the battery?
Verify the battery is correctly installed with proper polarity. If the watch still fails to operate, consult a professional technician as there may be additional internal issues.
Changing the battery in a Guess watch is a straightforward process that requires careful handling and the right tools. The key steps involve identifying the type of back cover your watch has—whether it is a snap-back, screw-back, or held by screws—then safely opening it to access the battery compartment. Using appropriate tools such as a case opener or small screwdriver helps prevent damage to the watch casing and internal components.

Once the back cover is removed, it is important to note the battery type and orientation before replacement. Using a compatible battery ensures optimal performance and longevity. After replacing the battery, securely resealing the back cover is crucial to maintain the watch’s water resistance and overall integrity. If at any point you feel uncertain or lack the necessary tools, consulting a professional watch technician is highly recommended to avoid accidental damage.

In summary, changing the battery in a Guess watch demands attention to detail, proper tools, and careful execution. Following these guidelines not only extends the life of your watch but also preserves its aesthetic and functional qualities. Regular maintenance and timely battery replacement contribute significantly to the reliable performance of your timepiece.

Author Profile

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.

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