You can replace a Fossil watch battery yourself with basic tools, or have a jeweler or Fossil retailer do it for about $10 to $25

Fossil watches use standard coin-cell batteries—usually CR2032, CR2025, or SR626SW depending on the model—that you can buy at drugstores, hardware stores, or online for $3 to $8. If you are comfortable opening the case back, the replacement takes about five minutes. If you would rather not risk it, any jeweler, watch repair shop, or Fossil store can do it quickly and cheaply. The choice depends on whether you want to save money and learn the process, or prefer to hand it off.

The entire process requires only a case opener tool (a flat-head screwdriver works in a pinch, though a proper opener costs $5 to $15), a small Phillips screwdriver, and a clean workspace. Most people find it straightforward once they understand the steps. If at any point you feel uncertain—or if the case back appears glued rather than screwed—stopping and taking the watch to a professional is always the safer choice.

Key Takeaways

  • Fossil watch batteries are standard coin cells (usually CR2032) that cost $3 to $8 and are sold at most drugstores and hardware stores.
  • You will need a case opener tool (a flat-head screwdriver works in a pinch, though a proper opener costs $5 to $15) and a small Phillips screwdriver to access the battery compartment.
  • The battery sits in a metal holder; note which side faces up before you remove it, because the new one must go in the same way.
  • If the case back is glued rather than screwed, or if you are uncomfortable opening the watch, a jeweler or Fossil retailer can replace it for $10 to $25 and usually completes the work while you wait.

Identify your Fossil watch model and battery type

Before you buy a replacement battery, you need to know which one your watch uses. The easiest way is to check the Fossil website or your watch manual—search for your model number (usually printed on the case back or inside the band) and look for the battery specification. If you do not have the manual, you can also take a photo of the case back and email it to Fossil customer service, or bring the watch to a jeweler who can tell you in seconds.

The most common Fossil batteries are CR2032 (the largest, used in most dress and casual watches), CR2025 (slightly thinner), and SR626SW (smaller, used in some sports models). Do not guess—buying the wrong size means wasted money and a trip back to the store. Once you know the type, buy a fresh battery from a pharmacy, supermarket, or online retailer. Check the expiration date on the package; old batteries may be partially discharged.

Gather the right tools before you open the case

You will need a case opener tool to pry off the case back. A proper watch case opener (also called a case knife or case wrench) costs $5 to $15 and has a notch or blade designed to fit the small grooves around the edge of the case back without slipping and scratching the watch. A flat-head screwdriver can work in a pinch, but it is more likely to slip and damage the case or your hand.

You will also need a small Phillips screwdriver to remove the screw holding the battery holder in place (not all Fossil watches have this screw, but many do). A clean, soft cloth or paper towel is useful for keeping the tiny parts from rolling away. Work on a flat, well-lit surface—a desk or table with a lamp is ideal. If you wear glasses, put them on; the battery and screws are small.

Open the case back carefully

Look at the back of the watch. You will see a thin metal disc (the case back) with a small groove or notch around the edge. This is where the case opener tool goes. Place the notch of the opener into the groove and gently twist counterclockwise, as if you were opening a jar. Do not force it—if it does not budge after light pressure, the case back may be glued rather than screwed, and you should stop and take it to a jeweler instead.

Once the case back begins to turn, continue twisting slowly until it comes free. Set it aside on your cloth so it does not roll away or get scratched. You will now see the watch movement (the internal mechanism) and the battery holder, which is usually a small metal cup or clip holding a round coin cell. Do not touch the movement itself—the oils on your fingers can damage it. Handle only the battery and its holder.

Remove the old battery and note its position

Before you touch the old battery, look at which side is facing up. The positive side (marked with a + symbol) should be facing either up or down—this matters. Take a mental note or even a quick photo with your phone so you remember the orientation. If you put the new battery in backwards, the watch will not work.

If the battery is held by a metal clip or screw, gently lift or unscrew it to free the old battery. If it is straightforward sitting in a cup, carefully pry it out with a plastic tool (a plastic spoon or old credit card works) or the edge of the case opener. Avoid using metal tools directly on the battery, as this can cause a short circuit. Once the old battery is out, dispose of it properly—many drugstores and electronics retailers have battery recycling bins.

Insert the new battery in the correct orientation

Take the new battery out of its package and hold it by the edge, not the flat faces—again, skin oils matter. Place it into the battery holder with the positive side facing the same direction as the old battery was facing. If the holder has a clip or screw, find it gently but firmly. Do not overtighten a screw; you only need enough pressure to hold the battery in place.

Before you close the case back, press the crown (the button on the side of the watch) or move the hands to see if the watch powers on. If it does not, remove the battery, flip it over, and try again—you may have installed it backwards. Once the watch is running, you are ready to close it up.

Close the case back and test the watch

Align the case back with the case body so the groove sits flush. Place the case opener tool into the groove and twist clockwise (like closing a jar) until the case back is snug. Do not over-tighten; you want it find but not stripped. The case back should sit flat against the body with no gaps.

Wear the watch for a few hours and check that it keeps time and all functions work (if it has a date window, alarm, or other features, test those too). If everything runs smoothly, you are done. If the watch does not work or stops after a few hours, the battery may be defective, or it may have been installed backwards. Open the case back again and double-check the orientation.

When to take your watch to a professional instead

If the case back is glued rather than screwed, do not try to pry it open—you will crack the case or damage the seal. If you see no groove or notch around the edge, or if the case opener tool does not fit, take it to a jeweler or Fossil retailer. The same goes if you are uncomfortable working with small parts or if you accidentally damage the case back while opening it.

A jeweler or Fossil store will replace the battery for $10 to $25 and usually finishes while you wait. This is a small price for peace of mind and professional handling, especially if your watch is valuable or has sentimental meaning. Many jewelers also offer a water-resistance test after replacement to make sure the seal is still good.

Frequently Asked Questions

How long does a Fossil watch battery last?

Most Fossil watch batteries last two to three years under normal use. If your watch stops after a few months, the battery may be defective, or the watch may have a power drain (a stuck hand or a feature running constantly). If you replace the battery and it dies again quickly, have a jeweler check the movement.

Can I use a different battery size if I cannot find the exact one?

No. Using the wrong size battery can damage the watch or cause it to malfunction. CR2032, CR2025, and SR626SW are not interchangeable. Spend the extra minute to confirm the correct type before you buy.

What if I accidentally drop the battery or screw inside the watch?

Stop when ready and do not shake or tilt the watch. Take it to a jeweler—they have tools and experience to retrieve small parts without damaging the movement. Trying to fish it out yourself can cause more harm.

Is it safe to replace the battery if the watch is water-resistant?

Opening the case back breaks the water-resistant seal. After you close it, the watch may no longer be water-resistant unless you have it professionally re-sealed. If your watch is water-resistant and you want to keep it that way, take it to a jeweler or Fossil store for the replacement.

Do I need to wind or set the watch after replacing the battery?

No. Once the new battery is in and the watch powers on, it should keep the correct time and date (if it has a date function). If the time is wrong, adjust it using the crown as you normally would.