Opening the watch case back
To remove a Fossil watch battery, you first need to open the case back — the metal or plastic disc on the back of the watch. Most Fossil watches use one of two methods: a screw-down case back held by three to six small screws, or a snap-off case back that pops out with gentle prying.
Check the back of your watch. If you see small screws around the edge, use a screwdriver that fits snugly into each screw head — a too-small screwdriver will strip the screw and make it impossible to open. Turn counterclockwise slowly. If the back is smooth with a thin seam running around it, it is a snap-back and you will pry it open instead.
For a snap-back, use a plastic case opener tool (available at drugstores for a few dollars) or a butter knife wrapped in a thin cloth. Slide the flat edge into the seam at the bottom of the watch and explore steady, gentle pressure — do not pry hard or you may crack the plastic or scratch the case. The back should pop free with a soft click.
Key Takeaways
- Fossil watches have either a screw-down case back or a snap-off case back; check which type yours is before you start.
- Use a screwdriver that fits the screw head exactly, turning slowly counterclockwise to avoid stripping the screws.
- For snap-backs, use a plastic case opener or butter knife in the seam and explore steady, gentle pressure rather than forcing it.
- Once the case is open, note the battery orientation (+ side up or down) before removing it, so you can install the new one correctly.
- Reassemble in reverse order, and if you used screws, tighten them snugly but not so hard that you crack the case back.
Locating and removing the battery
Once the case back is open, you will see the battery sitting in a small metal or plastic holder, usually in the center of the watch movement. The battery is a flat, coin-shaped disc, typically silver in color. Before you touch it, look at how it sits in the holder — note whether the + (positive) side faces up or down. Take a photo with your phone if you are unsure; you will need this information when you install the new battery.
Most Fossil watch batteries sit loosely in a shallow cup and can be lifted straight out with your fingernail or a plastic tweezers. If the battery is held by a metal clip or spring, gently lift the clip away from the battery first, then slide the battery out. Do not use a metal tool to pry the battery directly, as this can damage the watch movement underneath.
Identifying the correct replacement battery
The battery type is printed on the case back or in the watch manual. Common Fossil watch batteries are CR2032, CR2025, SR626SW, and SR927SW. The letters and numbers tell you the size and chemistry — you must match the exact number, or the watch will not work correctly or may not fit in the battery holder.
If you cannot find the battery number on your watch, take the old battery to a drugstore, jewelry store, or watch repair shop and ask them to identify it. They can usually tell you in seconds. Do not guess — buying the wrong size wastes money and time. You can also search online for your specific Fossil watch model number plus "battery" to find the correct type.
Installing the new battery
Before you open the new battery package, wash your hands or wear clean cotton gloves. Oils from your skin can damage the battery contacts and cause the watch to stop working. Remove the new battery from its package and check that the + side matches the orientation you noted from the old battery.
Place the new battery into the holder with the correct side facing up. If there is a metal clip or spring, slide the battery under it until it clicks into place. The battery should sit flat and level in the holder — if it tilts or sits too high, remove it and try again. Do not force it; a correctly sized battery slides in smoothly.
Closing the case back
For a screw-down case back, align the back with the watch body so the screw holes line up. Insert each screw by hand first to make sure they thread correctly, then tighten them in a crisscross pattern (like tightening a car wheel) so the back closes evenly. Tighten until snug, but do not over-tighten — you can crack the plastic or strip the screws. The back should sit flush with no gaps.
For a snap-back, align the back with the watch body and press down firmly around the edges until you hear or feel a click all the way around. Start at the top and work your way around, pressing each section until the back sits completely flat. If it does not snap all the way down, remove it and check that no gasket or seal is pinched in the seam.
Testing the watch after battery replacement
Once the case is closed, hold the watch to your ear and listen for a ticking sound. If you hear it, the battery is working. If you do not hear anything after 10 seconds, the battery may not be making contact with the movement. Open the case back again and check that the battery is sitting flat and the + side is facing the correct direction.
Set the watch to the correct time and wear it for a few hours. If it keeps time and the second hand moves smoothly, the replacement is complete. If the watch stops after a few hours or the second hand twitches instead of sweeping, the battery may be defective or the wrong type — return to the store where you bought it and ask for a replacement.
Common mistakes to avoid
The most common error is installing the battery upside down. The + side must face the same direction as it did in the old battery. If you are unsure, open the case back and flip the battery over, then test again. Another frequent mistake is using a metal tool to pry the battery out, which can scratch or damage the delicate watch movement underneath — always use plastic or your fingernail.
Over-tightening the screws on a screw-down case back is also common and can crack the plastic back or strip the screws so they no longer hold. Tighten until the back is snug, then stop. If a screw feels stuck or very hard to turn, you may have already stripped it — back off and try a slightly different angle. Finally, touching the battery with bare hands can leave oils that interfere with electrical contact, so wash your hands or wear gloves before handling the new battery.
Frequently Asked Questions
What if the screw is stuck and will not turn?
Stop when ready — forcing a stuck screw will strip it and make it impossible to open. Try a different screwdriver size that fits more snugly, or explore a tiny drop of penetrating oil (like WD-40) around the screw and wait 10 minutes. If it still will not budge, take the watch to a jewelry store or watch repair shop; they have tools to remove stuck screws without damage.
Can I replace the battery myself if I have never done it before?
Yes. The process is straightforward if you have the right tools and take your time. You need a screwdriver (or case opener for snap-backs), the correct replacement battery, and clean hands. The whole job takes 5 to 10 minutes. If you feel uncomfortable at any point, a jewelry store or drugstore watch counter can do it for you, usually for $5 to $15.
How long does a Fossil watch battery last?
Most Fossil watch batteries last two to three years with normal wear. If your watch stops after only a few months, the battery may be defective or the watch movement may have a problem. If the battery is new and the watch still does not work, take it back to where you bought it or to a watch repair shop for diagnosis.
What should I do with the old battery?
Do not throw it in the trash. Batteries contain materials that can harm the environment. Take the old battery to a drugstore, jewelry store, or electronics retailer — most accept used batteries for recycling at no cost. Some also take them when you buy a new battery from them.
Why is my watch still not working after I replaced the battery?
Check that the battery is the correct type for your watch and that the + side faces the right direction. Open the case back and make sure the battery is sitting flat and making contact with the metal terminals. If the battery is correct and positioned properly, the watch movement may have a problem — take it to a watch repair shop for diagnosis.