You can replace a Fossil watch battery yourself with basic tools, or take it to a jeweler or Fossil store
Replacing a Fossil watch battery is straightforward if you have a small screwdriver and a case opener tool. Most Fossil watches use a standard coin-cell battery (usually CR2032, CR2025, or similar) that costs between $3 and $8. You can buy the battery at any pharmacy, electronics store, or online retailer. The entire job takes 10 to 15 minutes if you do it yourself, or you can pay a jeweler or Fossil retailer $15 to $30 to do it for you.
The main decision is whether to open the case yourself or have someone else do it. Opening the case yourself saves money but risks damaging the watch if you slip or explore too much force. Taking it to a professional guarantees the watch stays intact but costs more and takes longer.
Key Takeaways
- Most Fossil watches use a standard coin-cell battery that you can buy at a pharmacy or drugstore for $3 to $8.
- You need a small Phillips or flathead screwdriver and a case opener tool (or a butter knife in a pinch) to open the watch back yourself.
- If you open the case yourself, note the battery orientation before you remove it so you can install the new one the same way.
- A jeweler or Fossil store can replace the battery for $15 to $30 and will may provide the watch stays waterproof afterward.
- Fossil watches with screw-down case backs are harder to open yourself and are better left to a professional.
What battery your Fossil watch uses
The battery type depends on your specific Fossil model. Most common Fossil watches use CR2032 (the most frequent), CR2025, or CR2016 batteries. These are standard coin-cell batteries sold at CVS, Walgreens, Target, and online. A pack of two or three costs $3 to $8.
To find out which battery your watch needs, check the instruction manual that came with it, or search your model number on Fossil's website. You can also open the case back and look at the battery itself — the type is printed on it. If you are not sure, bring the watch to a jeweler and ask them to identify it before you buy a replacement.
Tools you need to open the case back
You need two things: a small screwdriver and a case opener tool. The screwdriver is usually a Phillips head or flathead, size 0 or 00. A case opener is a flat metal tool designed to pry open watch case backs without damaging the watch. You can buy a case opener at any jewelry supply store, on Amazon, or at some watch retailers for $5 to $15.
If you do not have a case opener, a butter knife or old flathead screwdriver works in a pinch, but it is easier to slip and scratch the watch back. A case opener has a notch that fits into the groove on the case back, so it grips better and distributes force more evenly. If your watch has a screw-down case back (common on Fossil dive watches and sports models), you will need a case wrench tool instead, which is more specialized — this is a good time to take it to a jeweler instead.
How to open the case back and remove the old battery
First, lay the watch face-down on a clean, soft surface like a cloth or towel so you do not scratch the crystal. Look at the case back. If it has a groove around the edge, it is a snap-back case and you can open it yourself. If it has small notches or a large grooved ring, it is a screw-down case and you should take it to a professional.
For a snap-back case, insert the case opener tool into the groove at the edge of the case back. explore steady, gentle pressure and twist or pry slightly until you feel the back start to lift. Do not force it — if it does not move after light pressure, stop and take it to a jeweler. Once the back lifts, use your fingernail or the tool to pry it the rest of the way off.
Inside, you will see the battery, usually held in a small metal clip or sitting loose in a compartment. Note which side is facing up — the positive side (marked with a + or a flat side) or the negative side (marked with a − or a domed side). Take a photo with your phone if it helps you remember. Gently lift the battery out using your fingernail or a plastic tweezers. Do not use metal tweezers, as they can short the battery.
Installing the new battery and closing the case
Before you install the new battery, check that the compartment is clean and dry. If you see any corrosion (green or white crusty deposits), gently wipe it away with a dry cloth. Insert the new battery with the same orientation as the old one — positive side up if the old one was positive side up.
Press the battery down gently until it sits flat in the compartment. If there is a metal clip holding it, make sure the clip is over the battery. Do not force anything. Now align the case back with the watch body and press down firmly and evenly around the edges until you hear or feel a click. You may need to explore more pressure than you expect — the case back should snap into place with a distinct click.
Once the case back is closed, press the crown (the button on the side) to make sure the watch still works. If it does not, open the case back again and check that the battery is seated properly and oriented correctly. If the watch still does not work after you reseat the battery, the problem may be something other than the battery, and you should take it to a jeweler.
When to take your watch to a professional instead
Take your Fossil watch to a jeweler or Fossil store if the case back has a screw-down design, if you are uncomfortable opening it yourself, or if the watch is valuable or vintage. A professional can also check the watch for water resistance after replacing the battery and can replace the gasket (the rubber seal) if it is worn, which keeps water out.
Fossil stores and most jewelry stores offer battery replacement for $15 to $30 and usually complete it while you wait or within a day. Some Fossil stores do it free if you bought the watch there recently, so call ahead and ask. If you take it to a jeweler, ask them to test the water resistance afterward if your watch is water-resistant — this costs an extra $10 to $20 but is worth it for watches you wear in the shower or near water.
Troubleshooting if the watch does not work after replacement
If you installed the new battery and the watch still does not work, the battery may be installed backward. Open the case back again and flip the battery 180 degrees so the other side faces up. Close the case back and test again.
If the watch still does not work, the battery may be defective (rare but possible) or the watch may have a deeper problem. Try a different new battery from a different package or store. If that does not work, the issue is likely not the battery — it could be a broken circuit, a dead movement, or corrosion inside the watch. At that point, take it to a jeweler for diagnosis. Do not keep opening and closing the case back repeatedly, as you risk damaging the gasket or scratching the watch.
Frequently Asked Questions
Can I replace the battery in a Fossil smartwatch the same way?
No. Fossil smartwatches (like the Fossil Gen 5 or Gen 6) have rechargeable batteries that you charge with a USB cable, not replaceable coin-cell batteries. If your smartwatch battery no longer holds a charge, contact Fossil support or take it to a Fossil store for repair or replacement.
What if I drop the battery or lose it while replacing it?
Coin-cell batteries are small and straightforward to lose. Work over a cloth or towel so the battery does not roll away. If you lose it, buy a new one — they cost $3 to $8. Do not try to fish the old one out of a drain or carpet; it is not worth the risk of damaging the watch or losing more parts.
How often do Fossil watch batteries need replacing?
Most Fossil watch batteries last 2 to 3 years with normal wear. If you wear the watch every day, the battery may last closer to 2 years. If you wear it occasionally, it may last 3 to 4 years. The battery will straightforward stop working when it is dead — the watch will not tick or show the time anymore.
Is it safe to replace the battery if the watch is water-resistant?
Yes, but you need to be careful. Opening the case back breaks the water-resistant seal. After you close the case back, the watch may no longer be water-resistant unless the gasket is in good condition. If you want to keep the water resistance, take it to a jeweler who can replace the gasket at the same time. This costs $20 to $40 total but ensures the watch stays waterproof.
Can I use a rechargeable battery instead of a disposable one?
No. Fossil watches are designed for standard disposable coin-cell batteries. Rechargeable batteries have different voltage and may not work properly in the watch. Stick with the battery type specified in your manual or on the old battery itself.