How To Replace Battery In Timex Watch

Learning how to replace battery in Timex watch is a useful skill that can save you a trip to the jeweler. For many Timex watches, a simple battery replacement can be completed at home in just a few minutes. With the right tools and a careful approach, you can get your favorite watch ticking again quickly.

This guide will walk you through the entire process step-by-step. We’ll cover the tools you need, how to safely open the case, and how to handle the tiny components inside. You’ll also learn how to identify your specific watch model and when it might be better to seek professional help.

Replacing the battery in your Timex watch involves a series of careful steps. The core process is similar for most basic Timex models, including popular lines like the Weekender, Expedition, and Ironman. The key is to work methodically and keep your workspace organized.

Before you start, gather all necessary materials. This prevents you from having to stop midway through the procedure. Ensure you have good lighting and a clean, flat surface to work on, like a table covered with a soft cloth.

Tools And Materials You Will Need

You do not need a full watchmaker’s toolkit. Most items are common household tools or are inexpensive to purchase. Having the correct tools makes the job safer for you and your watch.

A set of precision screwdrivers (often labeled as “jewelry screwdrivers”).
A case opening tool or a small, blunt knife.
A pair of non-magnetic tweezers.
A new watch battery. The number (like 371, 395, or SR626SW) is crucial.
A soft cloth or pad to place the watch on.
A magnifying glass can be helpful for seeing small parts.
A small container to hold screws and the old battery.

Identifying Your Timex Watch Model And Battery Type

Not all Timex watches use the same battery. Using the wrong one can damage the movement. The easiest way to find the correct battery is to check the old one once you remove it. The battery code will be printed on its surface.

If you cannot open the watch yet, you can identify the model. Check the back of the watch case for a model number. You can also find the instruction manual that came with the watch. Alternatively, search online using the watch’s name and style number. Many retailers list the compatible battery type in the product details.

Common Timex watch batteries include the SR626SW (also called 377) and the SR920SW (also called 371). Some newer models might use a different cell, so verification is important.

Where To Find The Model Number

The model number is usually engraved on the case back. It might be a series of numbers and letters. For watches with a removable backplate, the number is often found on the inside of that back. If your watch has its original paperwork, the model number will be listed there as well.

Step-By-Step Battery Replacement Process

Now, let’s go through the replacement process from start to finish. Follow these steps in order and work patiently. Rushing can lead to mistakes like scratching the case or losing tiny screws.

Step 1: Prepare Your Workspace

Clear a well-lit table. Lay down a soft cloth to prevent scratches and to keep small parts from rolling away. Place all your tools and the new battery within easy reach. Ensure your hands are clean and dry to avoid getting dirt or moisture inside the watch.

Step 2: Open The Watch Case Back

This is the most critical step. Most Timex watches have one of two case back types: a snap-off back or a screw-down back. You need to identify which one you have.

For a snap-off back: Look for a small notch on the edge of the case. Insert your case opening tool or the blunt edge of a knife into this notch. Apply gentle, even pressure to pry the back off. Do not force it; if it doesn’t pop open easily, check for another notch.
For a screw-down back: You will see small notches or indentations around the perimeter. Use a case wrench or a rubber ball designed for this purpose. Place the tool in the notches and turn counter-clockwise to unscrew the back. If you don’t have these tools, a rubber glove can sometimes provide enough grip.

Once the back is loose, carefully lift it off and set it aside. Be mindful of a small rubber gasket that might be attached; this is important for water resistance.

Step 3: Remove The Old Battery

With the case back off, you will see the watch movement. The battery is the small, silver disc. Notice how it is held in place. Usually, there is a small metal clamp or a plastic bracket securing it.

If held by a metal clamp: You will see a small screw. Use your precision screwdriver to loosen this screw just enough to slide the clamp away from the battery. Do not remove the screw completely, as it is very easy to lose.
If held by a plastic bracket: Look for a small latch or tab. Gently use your tweezers to lift the tab and release the battery.

Once the battery is unsecured, use your non-magnetic tweezers to carefully lift it out. Note which side (positive + or negative -) is facing up. It’s a good idea to take a quick photo with your phone for reference.

Step 4: Insert The New Battery

Take your new battery and, using your tweezers, place it into the compartment in the same orientation as the old one. The positive side typically faces up, toward the case back. Do not touch the battery with your fingers, as skin oils can affect its performance.

Gently press down to ensure it is seated flat. Then, resecure the metal clamp or plastic bracket. If you loosened a screw, tighten it just until it is snug. Over-tightening can strip the tiny threads.

Step 5: Reassemble The Watch

Before putting the case back on, check that the rubber gasket is clean and seated properly in its groove. This gasket is essential for maintaining any water resistance the watch may have.

Align the case back with the watch. For a snap-off back, place it evenly over the case and press down firmly with the palm of your hand until you hear or feel a click. For a screw-down back, carefully thread it on by hand first, then use your tool to tighten it clockwise. Do not overtighten.

Step 6: Set The Time And Test Functions

Once the watch is reassembled, pull out the crown (the dial on the side) and set the correct time. Push the crown back in securely. Check that any additional functions, like a date window or indiglo night-light, are working properly. If the second hand begins moving in a ticking motion, your replacement was successful.

Common Challenges And Troubleshooting

Sometimes, things don’t go perfectly on the first try. Here are solutions to common problems people encounter.

The watch still doesn’t work: Double-check that the battery is inserted correctly with the right side up. Ensure the metal clamp is making proper contact and is not bent.
You stripped a screw: This can happen if you used the wrong size screwdriver. If the screw is stuck, you may need to take the watch to a professional.
The case back won’t snap shut: Make sure the gasket isn’t pinched and that the back is perfectly aligned. Applying even pressure around the edges usually helps.
You’ve lost a tiny screw: Work over a tray or a white sheet of paper to catch any falling parts. A magnet can help find steel screws, but keep it away from the watch movement.

If the watch has any complex features like chronograph hands, resetting them after a battery change might require a specific procedure outlined in the manual.

When To Seek Professional Help

While many Timex watches are straightforward, some situations warrant a visit to a watch repair shop. Knowing when to stop can prevent costly damage.

If your watch is a high-value or vintage model.
If it is labeled as water-resistant and you want to maintain that guarantee.
If the case back is stubborn and will not open with reasonable pressure.
If you see any corrosion or damage to the movement inside.
If the watch has multiple small hands (like a chronograph) that need to be recalibrated.

A professional will have specialized tools and the expertise to handle these situations safely. The cost is usually reasonable for a standard battery replacement.

Caring For Your Timex Watch After Battery Replacement

Proper care can extend the life of your new battery and your watch. A few simple habits make a big difference.

Avoid exposing the watch to extreme temperatures, as heat and cold can drain the battery faster. If you won’t be wearing the watch for an extended period, you can pull the crown out to stop the movement and conserve power, though this isn’t always necessary.

Check the case back gasket periodically for cracks or dryness. A compromised gasket allows moisture in, which can damage the movement and drain the battery. Having the gasket replaced every few years during a battery change is a good practice for water-resistant models.

Frequently Asked Questions

Here are answers to some common questions about replacing a Timex watch battery.

How Long Does A Timex Watch Battery Typically Last?

A standard silver-oxide battery in a Timex watch usually lasts between 2 to 5 years. The lifespan depends on the watch’s functions. Watches with an Indiglo backlight or multiple alarms may drain the battery more quickly.

Can I Replace The Battery In A Water-Resistant Timex Watch Myself?

You can, but you risk compromising the water resistance. The seal created by the case back gasket is delicate. If it is not perfectly reseated or if it gets damaged, the watch will no longer be water-resistant. For a watch you plan to wear swimming or in the rain, professional replacement is recommended to ensure the seal is intact.

Where Can I Buy A Replacement Battery For My Timex?

Watch batteries are widely available. You can find them at jewelry stores, watch repair kiosks, large drugstores, and online retailers like Amazon. Always purchase from a reputable seller to ensure you get a fresh, high-quality battery. Old stock can have reduced power.

What Should I Do With The Old Watch Battery?

Do not throw old watch batteries in the regular trash. They should be recycled. Many electronics stores, battery retailers, and watch shops have collection bins for used batteries. Proper disposal is better for the environment.

My Watch Worked For A Day Then Stopped, What Happened?

This often indicates a poor connection. The battery may not be seated properly, or the contact points inside the watch could be dirty or corroded. Open the watch again and check that the battery is secure. If you see any green or white crusty material on the contacts, it may need to be cleaned by a professional with the correct solution.