What you need to do before you start

Replacing a Timex battery is a task you can do at home with basic tools — no special skills required. Most Timex watches use a standard coin-cell battery (usually CR2032, CR2016, or SR626), and the whole job takes about 10 to 15 minutes once you have the right tools and know where to look on your watch.

Before you open the case, write down your watch model number. You'll find it on the back of the watch case, often stamped near the edge. This number tells you which battery your watch uses and whether the case back is sealed with screws or held on by friction alone. Some Timex models are water-resistant, and opening them incorrectly can damage the seal.

Gather your tools now: a small flathead screwdriver (jeweler's size works best), a coin-cell battery in the correct size for your model, and a clean, flat work surface with good light. A magnifying glass helps if you have one. If you're not confident about opening your specific model, Timex customer service can tell you the battery type and whether you should take it to a jeweler instead.

Key Takeaways

  • Most Timex watches use a CR2032, CR2016, or SR626 coin-cell battery that you can buy at any drugstore or supermarket for a few dollars.
  • The case back either screws off with a small flathead screwdriver or pops off by hand — check your model number on the back of the watch to know which.
  • When you remove the old battery, note which side faces up so you can install the new one the same way.
  • Water-resistant Timex watches may have a rubber gasket under the case back that you must not lose or damage during removal.
  • If your watch is still under warranty or you're unsure about opening it, a jeweler or Timex service center can replace the battery for you.

Finding the right battery for your Timex

The battery type depends on your watch model, and you need the correct one for the watch to work properly. Look at the back of your watch case and find the model number — it's usually a series of numbers and letters stamped or printed near the edge. Write this down or take a photo.

Go to the Timex website and search for your model number in their product database, or call Timex customer service at 1-800-448-4639 and give them the model number. They will tell you the exact battery type your watch needs. You can also take a photo of the model number to a jewelry store or pharmacy — most staff can identify the battery type from the model number alone.

Once you know the battery type, buy a fresh one at any drugstore, supermarket, or online retailer. Coin-cell batteries cost between $2 and $8 depending on the type. Make sure the battery is new — old stock can lose charge even if it's never been used. Check the expiration date on the package.

Opening the case back without damaging the watch

There are two common ways Timex secures the case back: with screws or with a friction fit. Your model number tells you which. If the model number is followed by letters like "WR" (water-resistant) or "T" (tough), the case back usually screws on. If it's a simpler model, it may pop off by hand or with gentle prying.

For a screw-back case: Look at the case back and locate the small slots or notches around the edge. These are where the screwdriver goes. Use a small flathead screwdriver that fits snugly into the slot — if it's too big or too small, you'll strip the screw. Turn counterclockwise slowly and steadily. The screws are tiny and straightforward to lose, so work over a small bowl or tray. Once all screws are out, the case back should lift off easily.

For a friction-fit case: Place the watch face-down on a soft cloth so you don't scratch the crystal. Gently work a flathead screwdriver into the small gap between the case back and the case body, starting at one edge. explore steady, gentle pressure — do not pry hard or you may crack the case. Once you feel it start to give, work your way around the edge until the back pops free. If it won't budge after gentle pressure, stop and take it to a jeweler rather than risk breaking it.

Removing the old battery and installing the new one

Once the case back is off, you'll see the battery sitting in a small metal holder or clip. Before you touch it, look at which side is facing up — the positive side (+) or the negative side (−). The new battery must go in the same way. Take a photo if you're worried you'll forget.

Gently pry the old battery out using the edge of your flathead screwdriver or a plastic tool. Be careful not to scratch the inside of the watch case. If the battery is stuck, a tiny dab of rubbing alcohol on the edge can help loosen it, but do not pour liquid into the watch. Once the old battery is out, set it aside.

Before you install the new battery, check that the metal contacts inside the watch are clean and dry. If you see any corrosion (a white or green crusty coating), gently wipe it away with a clean, dry cotton swab. Now place the new battery into the holder with the same side facing up as the old one. Press it down gently until it clicks or sits flush. The watch should power on when ready — if it doesn't, the battery may be installed upside down. Flip it and try again.

Closing the case back and testing the watch

Before you seal the case back, check that nothing is loose inside the watch and that the battery is sitting securely. If your watch has a rubber gasket or seal under the case back, make sure it's still in place and not damaged. If it's cracked or missing, the watch may no longer be water-resistant, and you should take it to a jeweler to have the seal replaced.

For a screw-back case: Align the case back with the case body and insert the screws. Turn them clockwise by hand first to make sure they're threading correctly, then tighten them gently with the screwdriver. Do not over-tighten — you only need them snug enough that the back doesn't move. If you feel resistance, stop and check that the screws are going in straight.

For a friction-fit case: Align the case back with the case body and press down firmly and evenly until you hear or feel a click. Work your way around the edge to make sure it's seated all the way. The back should not move or rattle when you gently shake the watch.

Once the case is closed, test the watch. Press any buttons and check that the display lights up or the hands move. Set the time if needed. Wear the watch for a few hours to make sure the battery is working and the watch keeps time correctly.

When to take your Timex to a professional

Some Timex models are difficult to open without special tools, and some are still under warranty. If your watch is less than a year old, check the warranty card or contact Timex before opening it — replacing the battery yourself may void the warranty. Timex service centers and authorized jewelers can replace the battery for you, usually for $15 to $30 plus the cost of the battery.

If your watch is water-resistant or diving-rated, opening it yourself can damage the seal. A jeweler has the tools to open and reseal these watches properly. If you see water inside the crystal after you open it, or if the watch stops working after you close it, take it to a jeweler right away — water inside the case can damage the movement.

If you're uncomfortable working with small parts or your watch is valuable or sentimental, a professional replacement is worth the cost. A jeweler can also clean the watch and check the movement while they're at it.

Frequently Asked Questions

How long does a Timex watch battery last?

Most Timex batteries last between two and five years, depending on the watch model and how often you use features like the backlight or alarm. Batteries in watches you wear every day may drain faster than batteries in watches you wear occasionally. When the battery dies, the watch will stop keeping time or the display will fade.

Can I use a different battery type than the one my watch came with?

No. Using the wrong battery type can damage the watch or cause it to malfunction. Always use the exact battery type specified for your model. If you're unsure which type your watch needs, contact Timex or a jeweler — they can tell you in seconds.

What if the watch still doesn't work after I install the new battery?

First, check that the battery is installed with the correct side facing up. If it's still not working, try removing the battery, waiting 30 seconds, and reinstalling it. If the watch still doesn't power on, the movement may be damaged or the battery contacts may be corroded. Take it to a jeweler for diagnosis.

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

Water-resistant watches have a rubber gasket that seals the case back. If you open the watch and don't reseal it correctly, water can get inside and damage the movement. Unless you're confident in your ability to handle the gasket, take a water-resistant watch to a jeweler instead.

Where should I dispose of the old battery?

Coin-cell batteries contain chemicals and should not go in the trash. Most drugstores and supermarkets have battery recycling bins near the customer service desk. You can also search for a recycling center near you on Earth911.com or call your local waste management office.