You can replace most Timex watch batteries at home with a small screwdriver and a few minutes of care

Most Timex watches use a standard coin-cell battery that you can swap out yourself without tools beyond a small flathead or Phillips screwdriver. The battery sits behind the caseback — the metal or plastic cover on the back of the watch — and once you open it, the swap takes less than five minutes. The hardest part is not losing the tiny screws.

Before you start, check what battery your Timex uses. The model number is usually printed on the caseback itself, or you can find it in the original paperwork. You can also take a photo of the caseback and bring it to a pharmacy, drugstore, or watch repair shop — they can tell you the battery type in seconds. Common Timex batteries are SR626SW, SR927SW, SR920SW, and CR2032, all available at drugstores for two to five dollars.

Key Takeaways

  • The battery type is printed on the caseback of your Timex, and you can match it to a replacement at any drugstore.
  • You need only a small screwdriver — flathead or Phillips depending on your watch — and a clean, flat work surface.
  • Remove the caseback screws carefully, lift out the old battery, and drop in the new one with the positive side facing up.
  • If the caseback is sealed or glued rather than screwed, a watch repair shop can open it for ten to twenty dollars.
  • Test the watch before you put the caseback back on to confirm the new battery works.

What you need to gather before you start

Lay out a clean, well-lit workspace — a kitchen table or desk works fine. You will need a small screwdriver that fits the caseback screws snugly without wobbling. Most Timex watches use either a small Phillips head (the cross-shaped one) or a flathead (the flat blade). If you use the wrong size, you risk stripping the screw and making it impossible to remove.

Have a small container or piece of tape ready to hold the screws so they do not roll away. A pill bottle, a small dish, or even a piece of folded paper works. Keep the new battery in its packaging until you are ready to install it — oils from your skin can affect some battery types, though modern Timex batteries are fairly resistant.

How to open the caseback

Lay the watch face-down on your workspace. Look at the caseback for screw slots. Most Timex watches have two to four small screws around the edge of the caseback. Position your screwdriver in the first screw slot and turn slowly counterclockwise. Do not force it — if the screw does not turn easily, you may have the wrong screwdriver size.

Remove all screws and place them in your container. Once the screws are out, gently pry the caseback up using the flat edge of your screwdriver or a plastic spoon. Work around the edge slowly — the caseback may be slightly stuck from age or dust, but it should come free without hard pressure. If it does not budge after gentle prying, stop and take the watch to a repair shop rather than risk cracking the caseback.

Removing the old battery and installing the new one

Once the caseback is off, you will see the battery — a small, flat, coin-shaped disc, usually silver or gold colored. It may be sitting loose in a battery holder, or it may be held in place by a small metal clip or plastic retainer. If there is a clip, gently lift it away from the battery. If the battery is loose, straightforward lift it out with your fingernail or a plastic spoon.

Before you drop in the new battery, check the orientation. The positive side (marked with a +) should face up, toward the watch face. The negative side faces down, toward the caseback. Slide or drop the new battery into the same spot where the old one was. If there was a clip, gently press it back down over the battery to hold it in place.

Testing and closing the watch

Before you screw the caseback back on, hold the watch to your ear and listen for a tick, or look at the second hand to see if it is moving. If the watch is now running, the battery is installed correctly. If nothing happens, the battery may be installed upside down — flip it and try again. If it still does not work, the battery may be defective, or the watch may have another problem that needs professional repair.

Once the watch is running, place the caseback back on the watch, aligning any notches or markers on the caseback with the watch body. Screw the caseback screws back in by hand first, then tighten them gently with your screwdriver. Do not over-tighten — you only need them snug enough that the caseback does not move. Over-tightening can strip the screws or crack the caseback.

When to take your Timex to a professional

If your caseback is sealed with glue or epoxy rather than screws, or if it has no visible screws at all, a watch repair shop or jewelry store can open it for you. This usually costs ten to twenty dollars and takes a few days. Some drugstore pharmacies also offer battery replacement for a small fee if you do not want to do it yourself.

If you open the watch and the battery compartment looks corroded, wet, or damaged, or if the watch still does not work after you install a fresh battery, the watch may have internal damage. A professional can assess whether repair is worth the cost, which varies depending on the watch model and the damage.

Frequently Asked Questions

What if I drop a screw inside the watch?

Stop when ready and take the watch to a repair shop. A loose screw inside can damage the movement. Do not shake the watch or try to retrieve it yourself — a professional has the right tools and can remove it safely.

Can I use any coin-cell battery, or does it have to be the exact model number?

Use the exact model number printed on the caseback. Batteries that look the same may have different voltages or sizes that can damage the watch or not fit properly. A drugstore employee can match the number for you if you bring the watch or a photo of the caseback.

How long does a new Timex battery usually last?

Most Timex batteries last two to five years depending on the watch model and how often you wear it. The original paperwork or the Timex website lists the expected battery life for your specific model.

Do I need to do anything special to the new battery before I install it?

No. straightforward remove it from the packaging and drop it in with the positive side facing up. You do not need to clean it or charge it.

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

The watch may have a damaged movement, a broken contact, or corrosion inside. Take it to a watch repair shop or a jewelry store for diagnosis. Repair cost varies, but a professional can tell you whether fixing it makes sense.