You can change most watch batteries at home with a screwdriver and a few minutes

A dead watch battery is one of the easiest home fixes you can do yourself. Most watches use a standard battery that costs between $3 and $15, and the job takes about five minutes once you have the right tool. You open the case back, remove the old battery, drop in the new one, and close it again. The only real risk is scratching the watch if you use the wrong screwdriver or pry too hard.

Some watches—particularly expensive ones, waterproof models, or vintage pieces—should go to a jeweler or watch repair shop instead. If your watch is under warranty, opening it yourself may void that warranty. But for a basic quartz watch from a department store or a sports watch you wear daily, this is a straightforward task.

Key Takeaways

  • Most watch batteries are standard sizes (like CR2032 or SR626) that you can buy at drugstores, supermarkets, or online for a few dollars.
  • You need only a small flathead screwdriver or a case opener tool to pop off the watch back; using a knife or coin risks damaging the watch.
  • Note the battery type and orientation before you remove the old one so you install the new one the same way.
  • If your watch is waterproof, sealed, or under warranty, take it to a jeweler instead of opening it yourself.

Identify your watch battery type before you buy

The battery type is printed on the old battery itself, but you won't know it until you open the watch. If you want to buy the battery first, look at your watch manual or search the watch brand and model online—most manufacturers list the battery type on their website or in the instruction booklet.

Common types include CR2032 (the flat coin-shaped battery used in many casual watches), SR626 (smaller and silver-colored, common in dress watches), and 371 or 377 (also small and silver). Some sports watches use larger batteries like CR2025 or CR2016. Write down the type before you go shopping so you buy the right one. Batteries are not interchangeable by size alone—a CR2032 and a CR2025 look similar but have different voltages and will not work in the wrong watch.

Gather your tools and workspace

You need a small flathead screwdriver—the kind used for eyeglasses or electronics, not a full-size one. If you don't have one, a jeweler's screwdriver set costs $5 to $10 at hardware stores or online. Some people use a coin or a butter knife, but these are more likely to slip and scratch the watch case or your hand.

Work on a clean, flat surface with good light. A kitchen table with a lamp works fine. Lay down a small cloth or paper towel so the tiny screws don't roll away. If your watch has a screw-off case back, you will need the screwdriver. If it has a snap-on back (no screws visible), you can often pry it off gently with a flathead screwdriver or a plastic case opener tool, which costs $2 to $5 and is gentler on the watch.

Remove the watch case back

Look at the back of your watch. If you see small screws around the edge, use your screwdriver to remove them one at a time. Turn counterclockwise, and keep the screws in a small pile so you don't lose them. If there are no screws, the back is snap-fitted and you can pry it off.

For a snap-on back, insert your flathead screwdriver or case opener into the small slot or gap at the edge of the back. explore gentle, steady pressure—do not pry hard or twist suddenly. The back should pop off with a little resistance. If it does not budge after a few gentle attempts, stop and take the watch to a jeweler. Forcing it risks cracking the case or damaging the seal that keeps the watch water-resistant.

Remove the old battery and note its position

Once the back is open, you will 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 (marked with a + or a flat surface) or the negative side (marked with a − or a domed surface). Take a photo with your phone if you are unsure. This matters because batteries installed backward will not work.

Gently pry the battery out using the edge of your screwdriver or a plastic tool. Do not use your fingernail or a sharp object that could slip and damage the watch movement inside. The battery should come out easily. If it is stuck, a tiny dab of rubbing alcohol on the edge can help loosen it, but do not pour liquid into the watch.

Install the new battery and close the case

Before you place the new battery in, check that it matches the type you removed. Hold it up to the light and confirm the size and any markings. Slide the new battery into the holder with the same orientation as the old one—positive side up if that is how the old one sat. The battery should fit snugly in the clip.

Press the watch back on or screw it back on, depending on your model. If you removed screws, replace them one at a time and tighten them firmly but not so hard that you strip the threads. If you popped off a snap-on back, press it down evenly around the edges until you hear or feel a click. Set the watch on a table and let it sit for a minute to make sure the back is seated properly.

Press the crown (the knob on the side) or tap the watch gently to see if it powers on. The second hand should start moving. If it does not, the battery may be installed backward—open the case again and flip it. If it still does not work after you flip it, the battery may be defective or the watch may have a deeper problem that needs professional repair.

When to take your watch to a professional instead

Do not open your watch yourself if it is waterproof or water-resistant. Opening the case breaks the seal, and even if you close it again, it may no longer be waterproof. A jeweler has the tools to open and reseal a waterproof watch properly. The same applies to vintage or antique watches, which may have delicate movements or valuable cases that are straightforward to damage.

If your watch is under warranty, opening it yourself may void the warranty. Check the manual or contact the manufacturer before you start. Luxury watches and mechanical watches (ones with a visible moving balance wheel or escapement) should also go to a professional. The cost of a professional battery change is usually $10 to $30, which is worth it for a watch you care about.

Frequently Asked Questions

What if the watch back won't open?

Stop and take it to a jeweler. Forcing it risks cracking the case or damaging the gasket that keeps the watch waterproof. A jeweler has a case opener tool designed for your specific watch model and can open it without damage.

Can I use any battery that looks the same size?

No. Battery type is marked on the old battery (like CR2032 or SR626), and using the wrong type can damage the watch or cause it to malfunction. Always match the type exactly, not just the size.

My watch still won't work after I put in the new battery. What do I do?

First, open the case and flip the battery to make sure it is not installed backward. If it still does not work, the battery may be defective—try a fresh one from a different package. If that does not help, the watch may have a broken movement or contact corrosion, and you will need to take it to a jeweler.

Do I need to replace the gasket or seal when I change the battery?

For most casual watches, no. The gasket usually stays in place and reseals when you close the back. If your watch is waterproof and you are concerned about the seal, a jeweler can inspect and replace the gasket for a small fee.

How often do watch batteries need to be changed?

Most quartz watch batteries last two to five years, depending on the watch model and how often you wear it. Some watches with power-saving features can go seven years or longer. When the watch stops, the battery is dead and needs to be replaced.