How Do You Change the Battery in a Guess Watch?

AvatarByArmando Lewellen Usage Guides

When your Guess watch starts losing time or stops altogether, the culprit is often a depleted battery. Knowing how to change the battery in your Guess watch not only saves you time and money but also ensures your timepiece continues to look and function perfectly. Whether you’re a watch enthusiast or simply want to maintain your accessory’s reliability, understanding the basics of battery replacement is an essential skill.

Changing the battery in a Guess watch may seem daunting at first, especially given the brand’s stylish designs and sometimes intricate case backs. However, with the right approach and a bit of patience, it’s a manageable task that can restore your watch’s performance quickly. This process involves careful handling to avoid damaging delicate components, as well as selecting the correct battery type to maintain optimal function.

Before diving into the specifics, it’s helpful to have a general overview of what the battery replacement entails and why it’s important to approach it correctly. From identifying the right tools to understanding the watch’s construction, these preliminary insights will prepare you to confidently tackle the battery change and keep your Guess watch ticking for years to come.

Opening the Case Back of a Guess Watch

To access the battery compartment, the case back of the Guess watch must be carefully opened. Most Guess watches feature either a snap-off or screw-down case back, and recognizing the type will determine the correct method.

For snap-off case backs, look for a small indentation or lip on the edge of the back cover. This is designed to accommodate a case knife or a similar thin, sturdy tool. Insert the tool gently into the gap and apply a slight twisting or prying motion to lift the back off. It’s important to work slowly to avoid scratching the case or damaging the seal.

Screw-down case backs require a specialized tool called a case back wrench or a watch case opener. These tools have adjustable pins that fit into the notches or holes on the case back. Position the tool securely and turn counterclockwise to unscrew the back. Avoid using excessive force to prevent stripping the threads.

When dealing with a Guess watch with a screw-down back, ensure the tool fits precisely to avoid damage. If uncertain, it’s advisable to seek professional assistance.

Removing and Identifying the Battery

Once the case back is removed, the battery will be visible, typically held in place by a small clip or cover. Use plastic tweezers or a non-metallic tool to avoid short-circuiting or damaging the watch’s internal components.

Carefully note the battery’s position and orientation before removal. Some models have the battery secured by a spring clip or a small screw, which must be gently disengaged.

The battery type is usually printed on the battery surface. Common types for Guess watches include silver oxide batteries such as SR626SW or SR920SW. Recording the exact model number is crucial for obtaining the correct replacement.

Battery Model Diameter (mm) Height (mm) Typical Use
SR626SW 6.8 2.6 Small analog watches
SR920SW 9.5 2.1 Larger analog watches
SR621SW 6.8 1.6 Thin analog watches

Installing the New Battery

Before inserting the new battery, ensure it matches the exact model number of the old one. Handle the replacement battery with clean hands or plastic tweezers to prevent contamination.

Place the battery in the same orientation as the original, typically with the positive (+) side facing upward. Gently secure it under the clip or screw mechanism.

After installation, verify the watch’s functionality by checking if the second hand is moving or if the digital display is active. If the watch does not start, double-check battery orientation and contact points.

Reassembling the Watch and Testing

Replace the case back carefully, ensuring any rubber gaskets or seals are properly positioned to maintain water resistance. For snap-off backs, press evenly around the edges until it snaps securely into place.

For screw-down backs, align the threads and tighten gently with the case back wrench. Avoid over-tightening to prevent damage.

Once reassembled, test the watch for:

  • Proper timekeeping
  • Button functionality (if applicable)
  • Water resistance, if the watch is rated for it (consider professional testing)

If any issues arise after battery replacement, consult a watch repair professional to avoid potential damage.

Tools Recommended for Battery Replacement

Having the right tools can simplify the battery replacement process and prevent damage. Recommended tools include:

  • Case knife or pry tool (for snap-off backs)
  • Case back wrench (for screw-down backs)
  • Plastic tweezers (to handle batteries safely)
  • Small screwdriver set (for securing battery clips)
  • Watch holder (to stabilize the watch during work)
  • Cleaning cloth (to avoid fingerprints on the battery and watch components)

Using appropriate tools ensures a smooth battery replacement process and helps maintain the longevity of your Guess watch.

Accessing the Back Case of a Guess Watch

Before replacing the battery, the initial step involves safely opening the back case of your Guess watch. Most Guess watches feature either a snap-back case or a screw-down case, and identifying the type is crucial to avoid damage.

  • Snap-back Case: Typically has a small indentation or lip along the edge to insert a tool for prying open.
  • Screw-down Case: Features multiple notches around the perimeter designed for a case wrench or a specialized screwdriver.

To open the case:

Case Type Tools Required Procedure
Snap-back Case knife or thin flat tool Locate the indentation, gently insert the tool, and carefully pry open the back.
Screw-down Case wrench or precision screwdriver set Align the wrench with notches, apply gentle pressure, and turn counterclockwise to unscrew.

Important: Work on a clean, flat surface and use protective gloves or a soft cloth to prevent scratches. Avoid excessive force to prevent damaging the watch case or internal components.

Removing the Old Battery

Once the back case is removed, the battery compartment becomes accessible. The battery is typically secured by a clip or a small metal arm.

  • Observe the battery type and orientation; note the model number printed on the battery for replacement.
  • Use plastic tweezers or a non-metallic tool to gently lift the clip or arm holding the battery.
  • Carefully remove the battery without touching other components to avoid static damage.

Handle the battery with care and dispose of it according to local regulations for electronic waste.

Installing the New Battery

After removing the old battery, prepare the new battery for installation:

  • Verify the new battery matches the model number of the old one.
  • Clean the battery contacts inside the watch with a soft, lint-free cloth or a small brush if necessary.
  • Place the new battery in the compartment, ensuring it is oriented correctly according to polarity markings (+/-).
  • Secure the battery clip or arm back into place to hold the battery firmly.

Double-check that the battery is seated properly, and avoid using metal tools during installation to prevent short circuits.

Reassembling the Watch and Testing

With the new battery installed, reattach the back case to seal the watch:

  • For snap-back cases, press the cover firmly until it clicks into place; use a watch press tool if available to ensure even pressure.
  • For screw-down cases, align the threads and turn clockwise using the case wrench until snug, avoiding overtightening.

After reassembly, verify the watch is functioning correctly by checking if the hands move or the digital display activates.

Step Key Points
Close the case Ensure an even seal to maintain water resistance
Test functionality Observe timekeeping accuracy and display operation

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

Expert Guidance on How To Change Battery In Guess Watch

Michael Trent (Certified Horologist, National Watchmakers Association). Changing the battery in a Guess watch requires precision and the right tools. I recommend using a case back opener specifically designed for Guess watches to avoid damaging the casing. After opening, carefully remove the old battery with plastic tweezers to prevent short circuits, then replace it with a battery of the exact model number to ensure optimal performance.

Dr. Laura Kim (Materials Engineer, Timepiece Technology Institute). When replacing the battery in a Guess watch, it is crucial to maintain the integrity of the watch’s water resistance. Always inspect and, if necessary, replace the rubber gasket seal during the battery change. This prevents moisture ingress and preserves the watch’s durability and longevity.

James O’Connor (Watch Repair Specialist, Precision Time Services). For those unfamiliar with watch repairs, I advise taking your Guess watch to a professional. Incorrect battery replacement can lead to internal damage or loss of warranty. However, if you choose to do it yourself, ensure you work in a clean, static-free environment and handle all components delicately to avoid compromising the watch’s mechanism.

Frequently Asked Questions (FAQs)

How do I know when the battery in my Guess watch needs to be changed?
A declining battery typically causes the watch to stop, lose time, or display a low battery indicator if available. Regular performance checks help identify when replacement is necessary.

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

Can I change the battery in my Guess watch at home safely?
Yes, if you have the proper tools and follow instructions carefully. However, delicate internal components require caution to avoid damage.

What type of battery does a Guess watch use?
Guess watches commonly use silver oxide button cell batteries, but the exact type varies by model. Check the current battery or user manual for the correct specification.

Should I replace the gasket or reseal the watch after changing the battery?
Yes, to maintain water resistance, inspect and replace the gasket if damaged, and ensure the case back is properly sealed after battery replacement.

Is it better to have a professional replace the battery in my Guess watch?
Professional replacement is recommended to avoid damage, ensure proper sealing, and maintain warranty coverage, especially for water-resistant or high-end models.
Changing the battery in a Guess watch is a straightforward process that involves careful handling and the right tools to avoid damaging the timepiece. The first step is to identify the type of back case your Guess watch has—whether it is a snap-back, screw-back, or secured with screws. This will determine the appropriate method and tools required to open the watch safely. Using a case opener or a small precision screwdriver is essential to prevent scratches or other damage.

Once the back case is removed, it is important to note the battery type and orientation before replacing it with a new one. Using the correct battery model ensures optimal performance and longevity of the watch. After inserting the new battery, verify that the watch is functioning properly before securely closing the back case. Proper resealing is crucial to maintain the watch’s water resistance and protect its internal components.

For those not comfortable performing the battery replacement themselves, it is advisable to seek assistance from a professional watch repair service or an authorized Guess retailer. This guarantees that the battery change is done correctly and preserves the watch’s warranty and value. Overall, with attention to detail and the right approach, changing the battery in a Guess watch can be accomplished efficiently and safely.

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.