You can replace a Timex watch battery yourself with basic tools in about 10 minutes

Most Timex watches use a standard coin-cell battery that you can swap out at home without special equipment. You'll need a small flathead screwdriver, a plastic pry tool or old credit card, and the correct replacement battery—which you can find at any drugstore, supermarket, or hardware store for $3 to $8. The whole job takes longer to find your tools than to do the work itself.

The process is the same whether your Timex is digital, analog, or a combination: open the case back, note which battery is inside, remove it, insert the new one with the correct side facing up, and close the case. If your watch is water-resistant, you may need to replace a rubber gasket when you close it again, but most everyday Timex watches don't require that step.

Key Takeaways

  • Timex watches almost always use a CR2032, CR2016, or SR626 coin-cell battery, which you can buy at any pharmacy or grocery store for a few dollars.
  • You need only a small flathead screwdriver and a plastic pry tool—a butter knife or old credit card works—to open and close the case back.
  • The battery goes in with the positive (+) side facing up; inserting it upside down will prevent the watch from working.
  • If your watch is labeled water-resistant, check whether the case back has a rubber gasket; if it does, you'll need to reinstall it when you close the watch.
  • If the watch still doesn't work after you install a new battery, the problem is usually a dirty contact or a watch that needs professional repair, not the battery itself.

Finding out which battery your Timex uses

Before you buy a replacement, you need to know which battery is inside. The easiest way is to open the case back and look at the battery itself—the battery number is printed right on it. Common Timex batteries are CR2032 (the most common), CR2016, SR626, and SR927. Write down the exact number.

If you don't want to open the watch first, check the instruction manual or the back of the watch box if you still have it. You can also search online for your specific Timex model number plus "battery" and find the answer in seconds. Once you know the number, buy an exact replacement—don't guess or buy a "close enough" battery, because the wrong size won't fit or won't power the watch correctly.

Opening the case back without damaging the watch

The case back is the metal or plastic disc on the back of the watch. Most Timex watches have a case back that either screws off or pops off with a small pry. Look at the back: if you see a thin slot or groove running around the edge, it screws off. If the back looks smooth with no visible seam, it pops off.

For a screw-off back, use a small flathead screwdriver that fits snugly into the slot. Turn it counterclockwise slowly—don't force it, because the slot can strip easily. Once it's loose, unscrew it the rest of the way by hand. For a pop-off back, slide a plastic pry tool (a butter knife, old credit card, or plastic spoon handle works) into the groove at the edge and gently twist. The back will pop free. Set the back and any screws in a small dish so you don't lose them.

Removing the old battery and installing the new one

Once the case is open, you'll see the battery sitting in a small metal holder or clip. The battery is round and flat, about the size of a dime. Note which side is facing up—the side marked with a + or the shiny side is the positive side. Gently pry the battery out with your fingernail or the plastic tool. If it's held by a metal clip, lift the clip slightly and slide the battery out.

Before you install the new battery, wipe both sides with a clean, dry cloth. Dust or corrosion on the battery or the contacts inside the watch can prevent it from working. Slide the new battery into the holder with the positive (+) side facing up, the same way the old one was oriented. Press it down gently until it sits flat. If there's a metal clip, make sure it holds the battery snugly but not so tight that you can't remove it later.

Closing the case back and testing the watch

Before you close the watch, check whether there's a thin rubber gasket (a small ring) around the inside edge of the case back. If there is one and it looks cracked, dried out, or is missing, you should replace it before closing the watch—a damaged gasket can let moisture in and damage the movement. Gaskets cost $2 to $5 and come with most Timex battery kits. If the gasket looks fine, leave it in place.

For a screw-off back, align the slot on the back with the slot on the case and screw it clockwise by hand first, then tighten gently with the screwdriver. Don't over-tighten; you'll strip the threads. For a pop-off back, align the back with the case and press down firmly around the edges until you hear or feel a click. The watch should be snug but not require force.

Once the case is closed, press a button or check the display to confirm the watch is working. If it's a digital watch, the screen should light up or show the time. If it's analog, the second hand should be moving. If nothing happens, the battery may be installed upside down—open the case again and flip it. If it still doesn't work after you flip the battery, the watch may have a deeper problem and should go to a watch repair shop.

What to do if the watch still doesn't work

A new battery that doesn't make the watch work usually means one of three things: the battery is installed upside down, the contacts inside the watch are dirty, or the watch has an internal problem that needs professional repair. Start by opening the case again and checking that the positive side of the battery is facing up.

If the battery is oriented correctly, remove it and look at the metal contacts inside the watch—the small metal pieces the battery touches. If they look dark, corroded, or dirty, gently rub them with a clean, dry cloth or a pencil eraser. Reinstall the battery and test again. If the watch still doesn't work, the movement (the internal mechanism) may be damaged, and you'll need to take it to a watch repair shop or replace the watch. A repair usually costs $20 to $40, so compare that to the price of a new Timex before you decide.

Frequently Asked Questions

Can I use a different battery if I can't find the exact one?

No. Each Timex is designed for a specific battery size and voltage. Using the wrong battery can damage the watch's circuit board or not work at all. Stick to the exact number printed on the old battery or in your manual. If you can't find it locally, order it online—it will arrive in a day or two.

How often do Timex watch batteries need to be replaced?

Most Timex batteries last two to three years with normal daily wear. Digital watches and watches with a backlight drain batteries faster and may need replacement every one to two years. If your watch stops suddenly, the battery is dead and needs replacement.

What if I drop the battery or it gets wet before I install it?

A dry battery that's been dropped is fine to use. If the battery got wet, dry it completely with a cloth before installing it. If you're not sure whether it's dry, buy a fresh one—they're cheap and a wet battery can corrode the contacts inside your watch.

Do I need to replace the rubber gasket every time I change the battery?

No, only if it looks cracked, dried out, or is missing. A gasket in good condition can last through several battery changes. If your watch is not water-resistant, you don't need a gasket at all.

Is it safe to open a water-resistant Timex watch myself?

Yes, as long as you reinstall the gasket correctly and don't force anything. Water-resistant watches need the gasket to seal properly, so if you're uncomfortable with that step, take it to a watch repair shop instead. The cost is usually $15 to $25.