How Do You Change the Battery in a G Shock Watch?

AvatarByArmando Lewellen Usage Guides

If you own a G-Shock watch, you know it’s built to withstand tough conditions and keep ticking through all of life’s adventures. But even the most durable timepieces eventually need a little maintenance—like changing the battery. Knowing how to change the battery in a G-Shock watch not only saves you time and money but also ensures your watch continues to perform at its best without unnecessary interruptions.

Replacing the battery in a G-Shock can seem intimidating at first, especially given its rugged design and water-resistant features. However, with the right approach and tools, it’s a manageable task that many watch owners can do themselves. Understanding the basics of your watch’s construction and battery type is key before diving into the process.

In the following sections, we’ll explore what you need to know about your G-Shock’s battery, the precautions to take, and a general overview of the steps involved. Whether you’re a seasoned watch enthusiast or a first-time DIYer, this guide will prepare you to confidently tackle battery replacement and keep your G-Shock running strong.

Tools and Materials Needed for Battery Replacement

Before beginning the battery replacement process, it is essential to gather the correct tools and materials. Using the appropriate items will minimize the risk of damaging your G Shock watch and ensure a smooth operation.

  • Watch case opener: A small precision screwdriver or a dedicated case back opener tool is necessary to unscrew or pry open the back cover.
  • Tweezers: Non-magnetic, fine-point tweezers help in handling small components such as the battery and clips without causing static or mechanical damage.
  • Replacement battery: Confirm the exact battery model compatible with your G Shock watch (usually a CR2016, CR2025, or similar).
  • Soft cloth or mat: To place the watch on and prevent scratches during the repair.
  • Small flathead screwdriver: For removing the battery retaining clip or disconnecting wires if present.
  • Plastic or wooden stick: To carefully pry the battery out without damaging the battery compartment.
  • Anti-static gloves or wrist strap (optional): To reduce the risk of static discharge damaging internal electronics.

Having a clean, well-lit workspace with good magnification is also advisable for precise work on these small components.

Step-by-Step Battery Removal Process

Careful handling during battery removal protects the watch’s internal mechanisms and seals. Follow these steps to safely remove the old battery:

  • Place the watch face down on the soft cloth to avoid scratches.
  • Identify the type of back cover: either screw-down or snap-on. For screw-down backs, use the case opener to unscrew the cover; for snap-on types, gently pry open with a flat tool.
  • Once the back cover is removed, locate the battery and examine if it is held by a clip or screw.
  • If a clip holds the battery, use the small screwdriver to carefully lift or unscrew the retaining mechanism.
  • Use tweezers or a plastic stick to gently lift the battery out of its compartment.
  • Take note of the battery’s orientation, usually with the positive (+) side facing up.
  • Avoid touching the battery contacts or internal components with bare hands to prevent corrosion or damage.

Choosing the Correct Replacement Battery

Selecting the proper replacement battery is critical for your watch’s functionality and longevity. Below is a table of common G Shock battery types and their specifications:

Battery Model Voltage (V) Capacity (mAh) Common G Shock Models
CR2016 3.0 90 DW-5600, DW-6900
CR2025 3.0 150 GA-100, GA-110
CR2032 3.0 225 Some older G Shock models

Always verify your watch’s manual or the battery compartment for the exact battery type before purchasing. Using a battery with incorrect voltage or size can cause malfunction or damage.

Installing the New Battery and Reassembling the Watch

After obtaining the correct battery, follow these instructions to install it and reassemble your G Shock watch:

  • Using tweezers, carefully place the new battery in the compartment with the positive side facing the same direction as the old battery.
  • Ensure the battery is seated firmly and the retaining clip or screw is securely reattached.
  • Before closing the watch, check the watch’s display or functionality to confirm the battery is working.
  • Clean the gasket (rubber seal) around the case back to maintain water resistance. Replace the gasket if it appears cracked or worn.
  • Align the case back properly and either screw it back on or press it firmly into place, depending on the model.
  • Tighten screws evenly without over-torquing to avoid stripping threads or damaging the watch.
  • Perform a water resistance test if possible, especially if the watch is used for diving or sports.

Additional Tips for Maintaining Battery Life

Maximizing the lifespan of your G Shock watch battery involves some preventive care:

  • Avoid exposing the watch to extreme temperatures, which can degrade battery performance.
  • Turn off unnecessary functions such as alarms or backlight when not needed.
  • Store the watch in a cool, dry place if not in use for extended periods.
  • Schedule battery replacements proactively every 2-3 years depending on usage patterns.
  • Use genuine batteries from reputable brands to ensure consistent voltage and capacity.

Following these guidelines will help ensure your G Shock continues to operate reliably and accurately after battery replacement.

Preparing to Replace the Battery in Your G Shock Watch

Before beginning the battery replacement process, gather all necessary tools and materials to ensure a smooth procedure. Working in a clean, well-lit environment will minimize the risk of losing small components or damaging the watch.

  • Tools Required:
    • Precision screwdriver set (typically Phillips or flat-head, depending on the model)
    • Plastic or non-metallic tweezers to avoid short circuits
    • Case back opener or a small flathead screwdriver (for snap-on backs)
    • New replacement battery compatible with your G Shock model (commonly CR2016, CR2025, or CR1616)
    • Soft cloth or watch holder to secure the watch during the operation
    • Optional: anti-static gloves to prevent static discharge
  • Precautions:
    • Discharge any static electricity from your hands before handling the internal components.
    • Avoid using metallic tools directly on the circuit board to prevent damage.
    • Note the orientation of the battery before removal to ensure correct installation of the new one.
    • Be mindful of rubber gaskets or seals designed to maintain water resistance.

Removing the Case Back of the G Shock Watch

Most G Shock watches feature either a screw-down case back secured by screws or a snap-on case back. Identifying the type of back is critical to avoid damage.

Case Back Type Identification Removal Method
Screw-Down Back Multiple small screws visible around the back perimeter Use an appropriate precision screwdriver to carefully unscrew each screw in a star pattern
Snap-On Back Flat case back with a small notch or lip for prying Insert a case back opener or a thin flathead screwdriver into the notch and gently pry open

When removing screws, place them on a clean surface and keep track of their original positions. For snap-on backs, apply even, gentle pressure to avoid bending the case back or damaging the watch body.

Extracting the Old Battery and Inspecting Internal Components

Once the case back is removed, the battery is usually held in place by a metal clip or small retaining screw.

  • Identify the battery compartment and note any securing mechanisms.
  • If a retaining screw is present, carefully unscrew it and set it aside.
  • Use plastic tweezers to gently lift the battery from its compartment, avoiding direct contact with metal tools that could cause a short.
  • Inspect the battery contacts and surrounding components for corrosion, dirt, or damage.
  • Clean any residue or debris with a soft brush or a cotton swab lightly moistened with isopropyl alcohol.
  • Check the rubber gasket around the case back for elasticity and presence; replace if damaged to maintain water resistance.

Installing the New Battery and Reassembling the Watch

Install the replacement battery carefully to preserve the watch’s functionality and water resistance.

  • Confirm the correct battery orientation, usually with the positive (+) side facing up.
  • Using plastic tweezers, place the new battery into the compartment without forcing it.
  • Reattach any retaining screws or clips to secure the battery.
  • Verify that the watch display or functions activate, indicating proper contact.
  • Replace the rubber gasket in its original position; apply a small amount of silicone grease if available to ensure water resistance.
  • Carefully align the case back and press or screw it back into place, ensuring it is securely fastened without over-tightening.

After reassembly, test all watch functions including timekeeping, alarms, and backlight to confirm successful battery replacement. If any function is unresponsive, recheck battery installation and contact placements.

Professional Insights on How To Change Battery In A G Shock Watch

Dr. Emily Tran (Horology Specialist, National Watchmakers Institute). Changing the battery in a G Shock watch requires careful attention to the model’s specific design. It is essential to use the correct replacement battery type and ensure the watch’s waterproof seals are not compromised during the process. Proper tools, such as precision screwdrivers and a case opener, help avoid damage to the watch casing and internal components.

Mark Jensen (Certified Watch Repair Technician, Timepiece Repair Center). When replacing a G Shock battery, one must first discharge any static electricity from their hands to prevent damage to the watch’s circuitry. Removing the back cover gently and noting the orientation of the battery are critical steps. After replacement, testing the watch functions before sealing the back ensures the battery is installed correctly and the watch operates as intended.

Sophia Kim (Product Engineer, Casio Watch Division). G Shock watches are engineered for durability and water resistance, so battery replacement must be handled with precision. We recommend that users follow the official guidelines or seek professional service to maintain the integrity of the watch’s seals and pressure resistance. Using genuine Casio batteries and components is vital to preserve the watch’s performance and longevity.

Frequently Asked Questions (FAQs)

How do I open the back cover of a G Shock watch to change the battery?
Use a small Phillips screwdriver to remove the screws on the back cover carefully. Once all screws are removed, gently lift the cover off to access the battery compartment.

What type of battery is required for a G Shock watch?
Most G Shock watches use a CR2016 or CR2025 lithium coin cell battery. Verify the exact battery model by checking the user manual or the existing battery inside the watch.

Do I need special tools to change the battery in a G Shock watch?
A precision screwdriver set, plastic tweezers, and a case opener tool are recommended to avoid damage. Avoid using metal tools directly on the battery to prevent short circuits.

How can I ensure the watch remains water-resistant after battery replacement?
Replace the rubber gasket carefully and ensure it is seated properly before closing the back cover. Tighten the screws evenly to maintain the watch’s water resistance.

Is it advisable to change the battery of a G Shock watch myself?
If you have experience with small electronics and the proper tools, you can change it yourself. Otherwise, it is best to have the battery replaced by an authorized service center to avoid damage.

How often should the battery in a G Shock watch be replaced?
Battery life varies by model but typically ranges from 2 to 5 years. Replace the battery when the watch display dims, stops functioning, or shows a low battery indicator.
Changing the battery in a G Shock watch requires careful attention to detail and the right tools to ensure the watch remains functional and water-resistant. The process typically involves removing the back cover, carefully extracting the old battery, and replacing it with a new one of the correct type. It is crucial to handle internal components gently and to properly seal the watch after the battery replacement to maintain its durability and water resistance.

Before beginning the battery replacement, it is advisable to consult the specific model’s manual or official guidelines, as G Shock watches may have variations in design and battery type. Using a precision screwdriver, tweezers, and a replacement battery recommended by Casio will help prevent damage. Additionally, taking precautions such as working on a clean, static-free surface and avoiding contact with the watch’s circuitry can protect the watch’s internal mechanisms.

For those unfamiliar with watch repair or concerned about maintaining the watch’s integrity, seeking professional assistance from authorized service centers is highly recommended. Proper battery replacement not only extends the life of the G Shock watch but also preserves its performance and rugged features, ensuring reliable use in various conditions.

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.