You can change a Timex watch battery yourself with basic tools in about 10 minutes
Most Timex watches use a coin-cell battery (usually CR2032, CR2025, or SR626) that you can replace at home without special training. You need a small flathead screwdriver, a plastic pry tool or old credit card, and a clean, flat work surface. The process is the same whether your Timex is digital, analog, or a combination: open the case back, remove the old battery, drop in the new one, and seal it shut. Timex does not use proprietary batteries or sealed cases that require a jeweler.
The entire job costs between $3 and $8 for a replacement battery, compared to $15 to $30 if you take the watch to a jeweler or department store. The only real risk is dropping a small part or accidentally scratching the watch case, both of which are straightforward to avoid with a little care.
Key Takeaways
- Timex watches use standard coin-cell batteries (CR2032, CR2025, or SR626) that you can buy at any drugstore or online for under $10.
- You need only a small flathead screwdriver and a plastic pry tool — a butter knife or old credit card works fine — to open and close the case back.
- The battery sits in a metal holder inside the case; note which side faces up before you remove the old one so you install the new one the same way.
- If your watch is water-resistant, the case back has a rubber gasket that you must not damage; replace it if it cracks or hardens.
Find out what battery your Timex uses before you buy
The easiest way is to check the original paperwork or the Timex website by model number. If you do not have those, open the case back (see below) and look at the battery itself — the model number is printed on the top. Common Timex batteries are CR2032 (the most frequent), CR2025, SR626, and SR927. Write down the exact number before you close the case.
Once you know the model, buy a fresh battery from a pharmacy, supermarket, electronics store, or online. Avoid extremely cheap batteries from unknown sellers; stick to Energizer, Duracell, Panasonic, or the store brand from a major retailer. A good battery costs $3 to $8 and lasts 2 to 5 years depending on how often you use the watch.
Open the case back without damaging the watch
Lay the watch face-down on a clean cloth or towel so the case back faces up. Look for a small slot or notch around the edge of the case back — this is where your screwdriver or pry tool goes. The slot is usually on one side, not all the way around.
Insert a small flathead screwdriver into the slot and turn it gently counterclockwise, as if you were opening a jar. Do not force it; if it does not turn easily, you may have the wrong tool or the wrong angle. Once you feel it loosen, you can often unscrew it by hand. Lift the case back straight up and set it aside on the cloth where you can see it.
If your watch is water-resistant, you will see a thin rubber gasket (seal) around the inside edge of the case back. Do not lose this — it keeps water out. If it looks cracked, hardened, or flattened, you should replace it before you close the watch again. Timex sells replacement gaskets for $2 to $5, or a jeweler can install one for $10 to $15.
Remove the old battery and install the new one
Inside the case, you will see the battery sitting in a metal holder or clip. The battery is a flat, round disc, usually silver or gold. Before you touch it, note which side is facing up — this matters. The positive side (marked with a + or the brand name) should face the same direction in the new battery.
Use your plastic pry tool or the edge of a credit card to gently lift one edge of the battery out of its holder. Do not use a metal tool, which can scratch the inside of the case or cause a short circuit. Once one edge is free, you can usually pinch the battery and lift it out. Set the old battery aside — do not throw it away yet, in case you need to check the model number again.
Take the new battery and place it in the holder with the positive side facing the same direction as the old one. Press down gently until you hear or feel a small click. The battery should sit flat and snug, not tilted or loose. If it does not stay in place, you may have installed it upside down — flip it and try again.
Close the case back and test the watch
Place the case back on the watch, aligning the slot with the screwdriver notch. Turn the screwdriver clockwise to tighten it. You do not need to force it — hand-tight is enough. If the watch is water-resistant and you replaced the gasket, make sure it is seated all the way around the edge before you close the case.
Once the case is sealed, check that the watch is working. If it is digital, the display should light up or show the time. If it is analog, the second hand should be moving. If nothing happens, open the case back and check that the battery is seated correctly and facing the right direction. If the watch still does not work after you reseat the battery, the problem may be something other than the battery — a broken circuit or a stuck hand — and you should take it to a jeweler.
What to do if the case back will not open or close
If the case back is stuck, do not force the screwdriver — you will strip the slot and make it worse. Instead, try a different screwdriver size; Timex uses several, and the wrong one will slip. If you still cannot turn it, soak the watch in warm (not hot) water for 10 minutes to loosen any corrosion or dried adhesive, then try again.
If the case back will not close after you install the new battery, check that the gasket is not pinched or folded. Remove the case back, straighten the gasket, and try again. If it still will not close, the gasket may be too thick or damaged — replace it with a new one before you seal the watch.
When to take your Timex to a professional instead
If your watch is very old, has sentimental value, or is a high-end Timex model (such as a vintage or limited edition), consider having a jeweler or watch repair shop change the battery. The cost is higher ($15 to $30), but they have the right tools and experience to avoid damaging the case or gasket. They can also check for other problems while they have the watch open.
If you open the case and see corrosion, water inside, or a battery that does not look like a standard coin cell, stop and take the watch to a professional. These signs mean the watch has been damaged or has an unusual design, and you risk making it worse.
Frequently Asked Questions
Can I use any CR2032 battery, or does it have to be a Timex brand?
Any CR2032 battery from a reputable maker works fine. Timex does not make batteries — they use standard coin cells from Energizer, Duracell, Panasonic, and others. Buy whatever is available at your local store; the brand does not matter as long as it is fresh and from a trusted seller.
What if I install the battery upside down?
The watch will not work, but you will not damage anything. Open the case back, flip the battery so the positive side faces the correct direction, and close it again. If you are not sure which way is correct, look at the metal holder — it usually has a small + mark on the side where the positive end should go.
How long does a new battery last in a Timex watch?
Most Timex batteries last 2 to 5 years, depending on the model and how often you wear the watch. Digital watches and watches with a backlight drain batteries faster than straightforward analog watches. If your battery dies much sooner than expected, the watch may have a problem and should be checked by a jeweler.
Is it safe to open a water-resistant Timex watch myself?
Yes, as long as you are careful with the gasket. The gasket is what keeps water out, so do not damage it when you open or close the case. If it cracks or hardens, replace it before you seal the watch. If your watch is rated for deep diving or swimming, consider having a professional handle it to make sure the seal is perfect.
What should I do with the old battery?
Take it to a battery recycling program or a store that accepts used batteries, such as Best Buy or Home Depot. Do not throw it in the trash — batteries contain materials that should be recycled. Many pharmacies and supermarkets also have battery drop-off bins near the customer service desk.