You can change most Timex watch batteries at home with a case opener and a fresh battery
Timex watches use standard coin-cell batteries — usually CR2032, CR2016, or SR626 — that you can buy at any drugstore or supermarket for two to five dollars. The real cost is the case opener, a small tool that pries the back off the watch without damaging it. You can find one online for under ten dollars, or ask a jeweler to open the case for you and hand you the battery to install yourself. The whole job takes five minutes once the case is open.
The steps are the same whether your watch is digital or analog: open the back, note which battery is inside, remove the old one, drop in the new one, and snap the case closed. The only real risk is losing a tiny screw or dropping the battery, so work over a table or towel, not over a sink.
Key Takeaways
- Most Timex watches use CR2032, CR2016, or SR626 batteries, which cost two to five dollars at any pharmacy or supermarket.
- You need a watch case opener (under ten dollars) to pry the back off without scratching or cracking the case.
- Write down the battery type before you remove the old one, because the number is printed on the battery itself and you will need it to buy the replacement.
- The battery sits in a metal holder with a small lip or tab — slide it out gently rather than prying, and slide the new one in the same way.
- If your watch has a screw-on case back, you will need a small screwdriver instead of a case opener.
What battery your Timex uses
The battery type is printed on the old battery itself, so you do not have to guess. Common Timex batteries are CR2032 (the most common, used in digital watches and many analog models), CR2016 (thinner, used in some slimmer watches), and SR626 (silver oxide, used in some analog watches). Write down the number before you throw the old battery away.
If you cannot see the number clearly, check the back of the watch case. Many Timex models print the battery type there. If neither the battery nor the case shows a number, search online for your specific Timex model number — you can usually find the model number printed on the back of the case — and the battery type will come up in the manual or product page.
Tools you need
A watch case opener is the main tool. It looks like a small flathead screwdriver with a notch or fork at the end. The notch fits into a groove on the watch case back and lets you pry without slipping and scratching the watch. You can buy one at any jewelry supply store, on Amazon, or at some drugstores for five to fifteen dollars.
If your Timex has a screw-on case back instead of a snap-on back, you will need a small Phillips or flathead screwdriver instead — check the back of the watch to see which type of screw it uses. Some Timex watches have both: a screw-on outer ring and a snap-on inner case. In that case, unscrew the ring first, then use the case opener on the inner back.
You will also want a clean, flat surface like a table or towel to work on, so you do not lose the battery or any small screws. A small bowl or cup is useful for holding screws while you work.
How to open a snap-on case back
Look at the back of your watch. If you see a thin groove running around the edge of the case back, it is a snap-on. If you see a screw or screws, skip to the next section.
Place the watch face-down on your work surface. Fit the notch of the case opener into the groove at the edge of the case back. Push gently but firmly — you are not trying to pry hard, just to separate the back from the case body. The back should pop off with light pressure. If it does not budge after a few tries, you may have the wrong tool or the watch may have a screw-on back instead.
Once the back is off, set it aside where you will not lose it. You will snap it back on the same way once the battery is in.
How to open a screw-on case back
If your watch back has one or more screws, use the correct screwdriver — Phillips head or flathead, depending on what you see. Turn counterclockwise to loosen. Most watch screws are small and straightforward to strip, so turn slowly and stop as soon as you feel resistance. Do not force it.
Once the screw is loose, you may be able to unscrew it by hand. If the back still does not come off, there may be a second screw on the opposite side. Check the entire back before you assume it is stuck.
Place the screw in a small cup or on a piece of tape so you do not lose it. You will need it to close the watch again.
Removing and replacing the battery
Once the case back is off, you will see the battery sitting in a metal holder. The holder usually has a small lip or tab on one side. Slide the battery out gently — do not pry or force it. If it is stuck, a tiny bit of gentle rocking side to side usually frees it.
Before you install the new battery, check the number on it one more time to make sure it matches the old one. Then slide the new battery into the holder the same way the old one came out. The flat side usually faces up, but check the holder to see which way the old battery was sitting. The battery should sit flush in the holder with no gaps.
If your watch has a small metal contact or spring under the battery, make sure it is still in place before you close the case. These contacts can fall out and cause the watch not to work.
Closing the case back
For a snap-on back, line up the back with the case body and press down firmly all the way around the edge until you hear or feel a click. Start at one point and work your way around, pressing evenly. The back should sit flush with no gaps.
For a screw-on back, place the back on the case and turn the screw clockwise by hand first, then tighten with the screwdriver. Do not overtighten — you only need it snug enough that the back does not move. Overtightening can crack the case or strip the screw.
Once the case is closed, press the watch to make sure it powers on or the hands move. If nothing happens, the battery may not be seated correctly. Open the case again, check that the battery is sitting flat in the holder, and try closing it again.
When to take it to a jeweler instead
If the case back will not open after several gentle tries, stop. Forcing it can crack the case or damage the threads. A jeweler can open it without risk and will usually change the battery for five to fifteen dollars, often while you wait.
You should also take it to a jeweler if your watch is waterproof or water-resistant. Opening the case can break the seal, and the jeweler has the gasket and tools to reseal it properly. The cost is higher — usually twenty to forty dollars — but it keeps your watch working as designed.
If your watch is vintage or valuable, a jeweler is the safer choice. They know how to handle older cases and can spot problems you might miss.
Frequently Asked Questions
Can I use any battery that fits in the slot?
No. The battery type matters because different types have different voltages and chemistry. Using the wrong battery can damage the watch circuit or cause it not to work at all. Always match the number on the old battery or the case back.
What if the battery is stuck and will not slide out?
Try rocking it gently side to side with your fingernail or a plastic tool — never a metal screwdriver, which can scratch the case. If it still will not budge after a minute of gentle rocking, stop and take it to a jeweler. Forcing it can damage the holder.
How do I know if the new battery is in the right way?
The flat side of the battery usually faces up, but the holder itself shows you which way it goes. Look at how the old battery was sitting before you removed it, and put the new one in the same orientation. The battery should sit flat and flush with no rocking.
Do I need to do anything special if my watch is waterproof?
Yes. Waterproof watches have a rubber gasket under the case back that seals out water. Opening the case breaks that seal. A jeweler can replace the gasket when they change the battery, which costs more but keeps your watch waterproof. If you open it yourself, the watch may no longer be waterproof.
How often do Timex watch batteries need to be changed?
Most Timex batteries last two to five years depending on the watch type and how often you use it. Digital watches and watches with a light drain the battery faster than straightforward analog watches. When the watch slows down or stops, the battery is dead and needs replacing.