Wrist Chronicles

How to replace battery on a rectangular wrist watch

Learn the step-by-step process for replacing the battery in a rectangular wristwatch. Keep your watch running smoothly with this easy guide.

To initiate the procedure for swapping out the energy cell in your rectangular timepiece, first gather the necessary tools: a small screwdriver, tweezers, and a replacement cell. Make certain that the replacement power source matches the specifications provided by the manufacturer, typically indicated on the rear of the device or in the user manual.

Begin by detaching the back cover. If your device features screws, use the screwdriver to carefully remove them, placing them in a secure location. For models without screws, you may need to gently pry the back using a flat tool to avoid damaging the casing. Caution is paramount during this phase to ensure the integrity of the timepiece remains intact.

Once the rear is open, observe the layout and take note of how the old energy source is positioned. Utilizing tweezers, extract the drained component, ensuring not to disturb any surrounding wiring or connectors. Insert the new power source in precisely the same orientation as the original, confirming proper alignment for optimal functionality.

After positioning the new element, replace the rear cover, re-secure it with screws or press it back into place as necessary. Finally, test the operation of the timepiece to confirm that everything is functioning as intended. Regular checks will help maintain the longevity of both the new component and the device itself.

Steps for Changing the Power Source of an Oblong Timepiece

Begin by gathering the necessary tools: a fine screwdriver, a plastic or wooden prying tool, tweezers, and a replacement cell with the correct specifications.

Top Rated
Energizer CR2032 Lithium Coin Cell Batteries
Amazon.com
Energizer CR2032 Lithium Coin Cell Batteries
Must-Have
Renata 371 SR920SW Silver Oxide Batteries
Amazon.com
Renata 371 SR920SW Silver Oxide Batteries

Next, identify the back cover of the timekeeper. Look for small grooves or notches; these are often designed for easy access. Use the prying tool to gently lift the back cover. Apply minimal pressure to avoid damaging the casing.

Once the back is removed, locate the compartment housing the energy cell. Some models may require you to remove additional components to gain access. Carefully detach any clips or covers using your screwdriver, ensuring that you don’t lose small parts.


Top Rated
Energizer CR2032 Lithium Coin Cell Batteries
Reliable power for watches and devices
This 100-count pack of Energizer CR2032 batteries ensures long-lasting power for your devices, including watches and toys. With excellent performance in extreme temperatures, these batteries are perfect for everyday and emergency use.
Updated: July 17, 2026 11:10 am

Gently remove the old energy cell using tweezers. Take note of its orientation, as the new component must be inserted in the same way. Position the replacement in the compartment and press it down firmly but gently until it clicks into place.

Reassemble the timepiece in reverse order. Ensure that all components are securely fitted, taking care to avoid any scratches on the exterior. Replace the back cover, aligning it properly before pressing it down to lock it into place.

Finally, check the functionality of the device. Adjust the settings as needed and ensure that the timepiece is operating correctly.

The following table summarizes the steps:

Step Action
1 Gather necessary tools.
2 Locate and remove the back cover.
3 Access the energy compartment.
4 Remove the old cell.
5 Insert the new cell.
6 Reassemble the timepiece.
7 Test functionality.

Identify the Type of Battery Required

Inspect the back of the timepiece carefully to find the battery type number, usually indicated by a code such as CR2032 or SR626SW. If the marking isn’t visible, refer to the user manual for specifications.

Another method involves disassembling the case. Use a small screwdriver or a case-opening tool, as outlined in prior sections, to access the internal components. Once exposed, the battery type will typically be printed on its surface.

In case the documentation is unavailable, consider these options:


Must-Have
Renata 371 SR920SW Silver Oxide Batteries
Swiss quality and superior leakage resistance
The Renata 371 SR920SW battery pack offers high capacity retention for your watches and devices, delivering consistent performance with every use. Ideal for gadgets requiring reliable power, these batteries stand out for their durability and low self-discharge rate.
Updated: July 17, 2026 11:10 am

  • Consult the manufacturer’s website for your specific timepiece model.
  • Visit a watch repair shop, as professionals often have quick access to detailed battery information.
  • Check online forums or communities dedicated to horology, where enthusiasts can provide insights based on their experiences with similar models.

Common Battery Types

The most frequently used types include:

  • CR2032: This lithium cell is often found in various quartz models.
  • SR626SW: A silver oxide cell, typically used in smaller timepieces.
  • AG10: Also known as 389, used in compact designs.

Each type varies in dimensions and voltage, making it crucial to ensure compatibility with your device. Double-check dimensions before purchase to avoid mismatches.

Gather Necessary Tools for Battery Replacement

Acquire a small Phillips or flathead screwdriver to open the case back. If the design includes a snap-back case, a case knife or plastic pry tool will be beneficial. Prepare a pair of tweezers for precise handling of the small components and the new power source.

A soft cloth is recommended to protect the surface of the timepiece during the process. Additionally, have a magnifying glass ready if intricate details are involved, especially for small screws.

Gather a replacement power cell based on the identification from the prior section. A clean workspace with adequate lighting ensures visibility and organization of components throughout the task.

Consider a small container or magnetic tray for screws and parts, preventing loss during the procedure. This setup streamlines the process and minimizes frustration.

Open the Watch Case Safely

Utilize a case opening tool specific for your timepiece model to prevent scratches and damage. Carefully insert the tool into the seam between the case back and the bezel, rotating it gently to create a slight gap.

If your model features screws, ensure you have the correct screwdriver size to avoid stripping. Remove each screw in a safe, organized manner, placing them in a small container for easy access.

For snap-back cases, apply light pressure around the edges once a gap appears. Use a plastic separator to pry the case open, ensuring not to force it to avoid breakage.

Before proceeding, check for any gaskets or seals around the case back. If present, inspect them for wear and replace if necessary to maintain water resistance.

Once the back is removed, avoid touching any internal components; handle only the edges of the case. Be mindful of static electricity by grounding yourself, especially with electronic pieces.

Remove the Old Battery Without Damage

To extract the old energy source, avoid using excessive force. Employ a non-metallic tool like a plastic spudger or a similar instrument to gently pry it out. This technique prevents scratches and reduces the risk of damaging internal components.

Disengage Any Connectors

If applicable, carefully detach any connectors holding the energy cell in place. Use the plastic tool to lift the connector without bending or breaking any pins. Take caution, as these parts can be particularly fragile.

Ensure Thorough Removal

After the energy source is loose, check for any adhesive that might still be securing it. If residue exists, gently peel it off while avoiding contact with the surrounding circuit board. Always handle components with dry fingers or tweezers to prevent any moisture-related issues.

Confirm that the energy source is completely removed before proceeding with the installation of the new one, ensuring a smooth transition without the risk of short circuits or damage.

Install the New Cell Correctly

Position the new cell at the correct angle according to the watch’s contact points. Ensure that the positive (+) side faces upwards, aligning it with the specified markings inside the casing. Press gently until you hear a click, indicating it is securely in place.

Confirm Proper Connection

After installing the new unit, check that it sits flat and that no gaps are visible. If your timepiece has a retaining clip, gently secure it over the new unit without applying excessive force. This step is critical for maintaining proper functionality.

Test the Timepiece

Once the cell is installed, close the case securely, ensuring that all clasps are fastened correctly. Test the functionality by adjusting the time and checking for accuracy. If it operates correctly, you’ve successfully installed the new cell.

Close the Watch Case and Test Functionality

After ensuring the new cell is properly seated, carefully position the back cover in alignment with the case. Apply gentle pressure until the cover clicks into place, ensuring a snug fit. Utilize a case press if available to avoid misalignment and potential damage.

Once the case is secured, conduct a functionality test. Activate the timepiece by pressing any buttons or winding it, if applicable. Observe the second hand and ensure it moves smoothly; check the other functions specific to your model, such as date or stopwatch features.

If any irregularities arise, recheck the installation. Open the case again and verify the new cell is in place and connections are intact. Proper contact is essential for the movement to operate accurately. After thorough inspection and confirmation of functionality, the task is complete.

Ethan Cole
Ethan Cole

Ethan Cole is a watch enthusiast and lifestyle writer based in New York. With over a decade of experience exploring the world of horology, he brings expert insights into timepieces that blend craftsmanship, innovation, and personal style. When he’s not reviewing the latest releases, Ethan enjoys vintage watch hunting and photographing timeless moments.

Wrist Chronicles
Logo