You can replace a Michael Kors watch battery yourself with basic tools, or take it to a jeweler or watch repair shop

A Michael Kors watch battery typically lasts two to three years before it stops holding a charge. When your watch stops, the battery is usually the culprit. You have two routes: open the case back yourself using a case opener tool and a fresh battery, or pay a jeweler or watch repair shop to do it. The DIY route costs $5 to $15 for the battery and a case opener tool if you don't already own one. A jeweler or repair shop will charge $15 to $50 depending on your location and whether they need to order a specific battery type for your model.

The DIY process takes 10 to 15 minutes if you work slowly and carefully. You need only three things: the correct battery size, a case opener tool, and a clean workspace. The watch back snaps or screws back on once the new battery is seated, and the watch should start running when ready. If the watch is water-resistant, the gasket (rubber seal) may need replacement when you open it, which adds $10 to $20 to a jeweler's cost but keeps the watch sealed against moisture.

Key Takeaways

  • Michael Kors watch batteries are standard sizes (usually 371, 377, 395, or 396) that you can buy at drugstores, electronics retailers, or online for $3 to $8.
  • You need a case opener tool (a flat metal disc with a notch, costing $5 to $12) to pry open the watch back without damaging the case.
  • The entire replacement takes 10 to 15 minutes if you work slowly and carefully, and the watch back snaps or screws back on once the new battery is seated.
  • If the watch is water-resistant, the gasket (rubber seal) may need replacement when you open it, which a jeweler can do but adds $10 to $20 to the cost.
  • Take the watch to a professional if the case back is glued shut, the battery compartment is corroded, or you are uncomfortable working with small parts.

Finding the right battery size for your Michael Kors watch

The battery size depends on your specific watch model. Look inside the watch back or in your original paperwork for a battery code — Michael Kors watches typically use 371, 377, 395, or 396 batteries. These are all standard button-cell sizes sold at most drugstores, pharmacies, supermarkets with watch sections, electronics retailers like Best Buy, and online at Amazon or eBay.

If you cannot find the code, take a photo of the watch face and model number (usually printed on the back) and show it to a jeweler or call a Michael Kors store. They can tell you the correct battery in under a minute. Do not guess — putting the wrong size battery in can damage the watch's internal contacts or not fit at all. Once you know the size, write it down so you have it for future replacements.

Getting the tools you need

You need a case opener tool, also called a case back opener or watch opener. This is a flat metal disc with a notch cut into the edge, designed to fit into the groove on the watch back and pry it open without scratching the case. They cost $5 to $12 and are sold at jewelry supply stores, online retailers, and sometimes at watch repair shops.

You may also want a small flathead screwdriver (if your watch back is held by a tiny screw rather than a snap-fit), tweezers to handle the battery without touching it with your bare fingers, and a soft cloth to lay the watch on while you work. A magnifying glass or phone camera zoom helps if the battery compartment is small. All of these are optional — the case opener is the only essential tool. If you plan to replace the battery more than once, buying these tools now saves money compared to paying a jeweler each time.

Opening the watch back without damage

Lay the watch face-down on a soft cloth so the back is facing up. Locate the small groove or notch around the edge of the watch back — this is where the case opener fits. Insert the notch of the case opener into the groove and gently explore downward and outward pressure, as if you are prying a lid off a jar. The back should pop off with light pressure.

If the back does not budge after gentle pressure, stop and do not force it. The back may be glued, sealed with a gasket that has dried, or held by a screw. Take it to a jeweler rather than risk cracking the case or scratching the finish. If the back has a small screw hole, use a tiny flathead screwdriver to unscrew it first, then the back will lift off. Some Michael Kors watches have both a screw and a snap-fit, so check for both before you assume the back is stuck.

Removing the old battery and installing the new one

Once the back is open, you will see the battery sitting in a small metal compartment. Use tweezers or a plastic tool to gently lift the old battery out — do not touch it with your bare fingers, as skin oils can corrode the contacts. Set it aside. Take a moment to look at the compartment and note which side of the battery was facing up, because the new battery must go in the same way.

Before you install the new battery, look at the compartment. If it looks corroded (green or white crusty deposits), or if there is visible damage to the metal contacts, take the watch to a jeweler. Corrosion can prevent the new battery from making good contact and will drain it quickly. If the compartment looks clean, place the new battery into the slot with the positive side (marked with a + or the flat side) facing up, unless the watch design shows otherwise. Press it gently until it sits flat and makes contact with the metal terminals on both sides.

Closing the watch back and testing

Align the watch back with the case and press it down firmly until it snaps into place. You should hear or feel a small click. If your watch back has a screw, use the flathead screwdriver to tighten it — do not over-tighten, as this can strip the threads. A snug fit is all you need; you are not trying to crush the back into the case.

Turn the watch over and check that the second hand is moving. If it is, the battery is making contact and the watch is working. If the second hand does not move after 30 seconds, the battery may not be seated correctly. Open the back again, remove the battery, and reinstall it, making sure it is pressed all the way down. If it still does not work after a second attempt, the battery may be defective or the watch movement may need professional service.

When to take your watch to a professional

A jeweler or watch repair shop is the right choice if the case back is glued or sealed, the battery compartment shows corrosion, the watch is water-resistant and you want the gasket replaced, or you are not comfortable working with small parts. Water-resistant watches have a rubber gasket around the inside of the case back that can dry out and crack over time. Replacing it when you change the battery keeps the watch sealed and prevents moisture damage. A jeweler can do this in 15 to 20 minutes and will charge $10 to $20 for the gasket plus the battery cost.

If your watch has not worked in several years, a jeweler can also check whether the movement (the internal mechanism) is still functional before you invest in a new battery. Sometimes a watch that has sat unused will need a professional cleaning and lubrication to run again. A jeweler can tell you whether the movement is worth servicing or whether the watch is beyond economical repair.

Frequently Asked Questions

How do I know which battery my Michael Kors watch needs?

Check the inside of the watch back for a printed code (usually 371, 377, 395, or 396), or look at your original paperwork. If you cannot find it, a jeweler or Michael Kors store can identify the model from a photo and tell you the correct battery in minutes.

Can I use any brand of battery, or does it have to be Michael Kors?

Any brand of the correct size works — Energizer, Duracell, Panasonic, and store brands are all the same. Buy the size code, not the brand name. Michael Kors does not make batteries; they source them from standard manufacturers.

What if the watch back is stuck and will not open?

Stop explore force. The back may be glued, sealed with a dried gasket, or held by a screw you have not found. Take it to a jeweler rather than risk cracking the case. They have specialized tools and can open it safely.

Will replacing the battery myself void the warranty?

If your watch is still under warranty, opening it yourself may void the warranty. Check your paperwork or contact Michael Kors before you open it. If the watch is out of warranty, opening it yourself does not affect anything.

How long will a new battery last in my Michael Kors watch?

Most Michael Kors watch batteries last two to three years with normal daily wear. If you wear the watch constantly, the battery may last closer to two years. If you wear it occasionally, it may last closer to three years.