What You Need Before You Start

Changing a Fossil watch battery yourself takes about 15 minutes and costs $5 to $15 for the battery itself. You will need a small Phillips head screwdriver (size #0 or #00), a plastic pry tool or old credit card, a fresh battery in the correct size for your watch model, and a clean, flat work surface with good lighting. A magnifying glass helps but is not required.

The most common Fossil watch batteries are CR2032, CR2016, and SR626SW. Check your watch's case back — the metal or plastic cover on the back — for the battery size printed there. If you cannot read it, look up your specific Fossil model number online or ask a jeweler what battery it uses. Buying the wrong size means the battery will not fit, so verify before you purchase.

Key Takeaways

  • Most Fossil watches use a CR2032, CR2016, or SR626SW battery, which you can find printed on the case back or by looking up your model number.
  • You will need a small Phillips screwdriver, a plastic pry tool, and a clean workspace; the entire job takes about 15 minutes.
  • Remove the case back by unscrewing the screws around the edge, then lift out the old battery and insert the new one with the positive side facing up.
  • If the case back is glued rather than screwed, do not force it — take the watch to a jeweler instead to avoid damaging the seal.
  • After closing the watch, test it by listening for a tick and checking that the hands move; if nothing happens, the battery may be installed backwards.

Removing the Case Back

Lay your watch face-down on a clean cloth or paper towel. Look at the back of the watch and identify whether it is held on by small screws around the edge or whether it appears to be sealed with no visible fasteners. If you see screws, use your Phillips screwdriver to remove each one, working slowly and keeping them in a small container so you do not lose them. Most Fossil watches have two to four screws.

Once the screws are out, use your plastic pry tool or the edge of an old credit card to gently lift the case back away from the watch body. Start at one edge and work your way around, explore steady pressure rather than forcing it. The case back should come free with gentle persuasion. If it does not budge after a minute of careful work, stop — the back may be glued, and forcing it will crack the seal and damage the watch.

Taking Out the Old Battery and Installing the New One

Once the case back is off, you will see the battery sitting in a small metal or plastic holder. It is usually a flat, coin-shaped disc. Note which side is facing up — the positive side, marked with a plus sign or the lighter color, should be facing toward you. Gently pry the old battery out using your plastic tool or a fingernail. Do not use a metal screwdriver, as it can scratch the watch interior.

Before you insert the new battery, check that it is the correct size and that you have not touched the flat surfaces with your bare fingers — skin oils can reduce battery life. Place the new battery into the holder with the positive side facing up, the same direction the old one was facing. Press it down gently until it sits flat and find. You should hear or feel a small click as it settles into place.

Closing the Watch and Testing It

Align the case back with the watch body and press it down firmly until it sits flush. Then reinstall the screws one at a time, tightening them in a crisscross pattern — if there are four screws, tighten the top one, then the bottom one, then the left and right. This keeps the back from warping. Do not overtighten; stop as soon as you feel resistance.

Once the case back is sealed, flip the watch over and listen closely near the dial. You should hear a faint ticking sound within a few seconds. If you hear it, the battery is working. Check that the second hand is moving around the dial. If you hear nothing and the hands are not moving, the battery may be installed backwards — remove the case back again and flip the battery over so the positive side faces up.

What to Do If the Case Back Is Glued

Some Fossil watches, particularly older or waterproof models, have case backs that are glued shut rather than screwed. If you see no screws and the back does not lift after gentle prying, stop when ready. Forcing a glued case back will crack it and break the water seal, making the watch unrepairable.

Take the watch to a jewelry store or a Fossil retailer instead. Many will change the battery for $10 to $25 and will have the proper tools to open glued case backs without damage. This is the safest option and takes only a few days in most cases.

Common Mistakes and How to Avoid Them

The most frequent error is installing the battery backwards. The positive side (marked with a plus sign or a lighter color) must face up toward the dial. If your watch does not tick after you close it, this is almost always the reason. Open it back up and flip the battery over.

A second common mistake is overtightening the screws on the case back. You only need to tighten them until they stop naturally — forcing them can strip the threads or crack the back. If a screw feels stuck, back it out slightly and try again at a gentler angle.

Do not touch the flat surfaces of the new battery with your bare fingers before installing it. Skin oils can corrode the contacts and shorten battery life. If you do touch it, wipe it clean with a dry cloth before inserting it.

Frequently Asked Questions

How long does a Fossil watch battery last?

Most Fossil watch batteries last two to three years with normal daily wear. Battery life depends on the watch model, how often you use features like the backlight, and the specific battery type. CR2032 batteries typically outlast smaller types like SR626SW.

Can I use any CR2032 battery, or does it have to be a Fossil brand?

Any quality CR2032 battery from a reputable brand will work. You do not need a Fossil-branded battery. Look for batteries from Energizer, Duracell, Panasonic, or other established manufacturers. Avoid very cheap batteries from unknown brands, as they may have shorter lifespans.

What if the watch still does not work after I change the battery?

First, open the watch again and confirm the battery is installed with the positive side facing up. If it is, the watch may have a dead circuit or a broken contact. Take it to a jeweler or Fossil store for diagnosis. Do not keep opening and closing it, as repeated handling increases the risk of damaging the seal.

Is it safe to change the battery myself if the watch is waterproof?

If your watch is waterproof and the case back is screwed, you can change the battery yourself without affecting the water seal. However, if the case back is glued or if you are unsure, take it to a professional. Improper closure can break the seal and allow water inside.

Can I reuse the old battery if I put it back in?

No. Once a battery has been removed from a watch, it should not be reused. Even if it still has some charge, the contacts may have oxidized, and reinstalling it risks poor connection and watch failure. Always use a fresh battery.