You can change most Timex watch batteries yourself with a case opener and a fresh battery

Most Timex watches use a removable back that you can open with a flat tool, swap the old battery for a new one that matches the original part number, and close again. The whole job takes five to ten minutes. You do not need special training or expensive equipment — a coin, a plastic case opener (under $5), and the correct replacement battery are all you need.

If your watch is waterproof or has a sealed back, or if you are uncomfortable opening it yourself, a jeweler or watch repair shop can do it for $10 to $25. The steps below cover the standard removable-back Timex, which is the most common type you will encounter.

Key Takeaways

  • Find your watch's battery type by looking at the back of the case or checking your Timex manual — common types are SR626SW, SR927SW, and CR2032.
  • Buy the exact replacement battery before you start, because using the wrong type can damage the watch or cause it to run incorrectly.
  • A plastic case opener or a coin works to pry open the back; avoid metal tools that can scratch the case.
  • After you install the new battery, test the watch for a few seconds before closing the back to make sure it is running.
  • If your watch back is sealed or glued shut, take it to a jeweler rather than forcing it open.

Identify your Timex watch battery type

The battery type is printed on the inside of the watch back. Open the back (or look at it without opening if you can see the inside), and look for a code like SR626SW, SR927SW, CR2032, or similar. Write down the exact code — this is the number you will use to buy the replacement.

If you cannot see the back clearly or the printing is worn away, check your Timex manual or warranty card. You can also search "Timex [your watch model number] battery" online, and most results will list the correct type. Do not guess — using the wrong battery can cause the watch to run fast or slow, or stop working altogether.

Gather the right tools and battery

You need three things: the correct replacement battery (buy it before you start), a plastic case opener or a flat coin, and a clean, dry work surface. Plastic case openers are sold at drugstores, hardware stores, and online for $2 to $5. A coin works too, but plastic is safer because it will not scratch the watch back.

Buy the battery at a drugstore, pharmacy, supermarket, or online. Common Timex batteries cost $3 to $8. Bring the battery code with you or order it online by the exact number. Do not buy a generic "watch battery" — the code matters, and ordering by the specific part number ensures you get the right one.

Open the watch back

Look at the back of your watch. Most Timex watches have a small notch or slot on the edge of the back cover. Insert the edge of your plastic opener or coin into the notch, then gently twist or pry upward. The back should pop off. If it does not move after light pressure, stop — your watch may have a sealed back, and forcing it can crack the case.

Once the back is off, set it aside in a safe place. You will see the battery inside, usually held in place by a small metal clip or sitting flat against a contact. Do not touch the battery with your bare fingers if you can help it — oils from your skin can reduce battery life. If you do touch it, wipe it gently with a clean, dry cloth before installing it.

Remove the old battery and install the new one

If the battery is held by a metal clip, gently lift the clip away from the battery. The battery should come free. If it is sitting flat, use a plastic tool or the edge of your case opener to lift it out carefully. Set the old battery aside in a safe place so you do not lose it.

Before you close the back, test the watch. Hold the new battery in place with your finger and listen for a ticking sound, or look at the second hand to see if it is moving. If it is, the battery is making contact and the watch is working. If nothing happens, remove the battery, check that it is the right type, and make sure it is oriented correctly — the flat side usually faces down, toward the watch movement. Consult your manual if you are unsure about orientation.

Close the back and check your work

Once the watch is running, press the back cover down firmly until it clicks or seats flush with the case. You should hear or feel a small snap. Do not force it — if it does not seat smoothly, remove it and check that the battery is sitting flat and nothing is blocking the edges.

After the back is closed, wear the watch for a few minutes and listen for normal ticking. Check that the time is correct and the hands are moving at the right speed. If the watch stops or runs very fast or slow, the battery may be the wrong type or installed backwards — open the back again and check your work.

When to take your watch to a professional

If your watch back is glued, welded, or sealed shut, do not try to open it yourself. A jeweler or watch repair shop has the right tools to open sealed backs without damaging the case. The same applies if your watch is waterproof — opening it yourself can break the water seal, and the watch will no longer be water-resistant.

If you open the back and the battery is held in place by something other than a straightforward clip — for example, if it is soldered or if there are multiple small parts — take the watch to a professional. A jeweler can usually change the battery while you wait, and the cost is usually $10 to $25 plus the battery itself. This is a safer choice than risking damage to the movement inside.

Frequently Asked Questions

What if I put the battery in backwards?

The watch will not work. Batteries have a positive and negative side, and they only work one way. If you installed it and the watch did not tick, remove the battery and flip it over. The flat side usually goes down, but check your manual if you are unsure.

How long does a Timex watch battery last?

Most Timex watch batteries last two to three years with normal wear. If your watch stops after a few weeks, the battery may be defective or the wrong type. Take it back to where you bought it and ask for a replacement battery.

Can I use a different battery type if I cannot find the exact one?

No. Using a different battery type can cause the watch to run incorrectly or damage the movement. Spend a few minutes finding the exact code and ordering the right battery — it is worth the wait.

Do I need to reset the time after changing the battery?

No. Timex watches do not lose the time when you change the battery — the movement keeps running while the back is open. The time should be correct as soon as you close the back.

What should I do with the old battery?

Take it to a battery recycling program or a store that accepts used batteries — many drugstores and supermarkets have collection bins. Do not throw it in the trash.