Apple Watch Battery Replacement Guide – By Mr Fix

October 16, 2025

Is your Apple Watch having trouble keeping a charge? Maybe the battery dies quickly, or you’ve seen a scary bulge on the rear of the device. These are signs that your Apple Watch battery might be getting close to the end of its life and might need to be replaced. All rechargeable batteries lose their ability to hold a charge and work over time. Sometimes, a swollen battery can even push on the watch’s internal parts, which could cause more damage.

Replacing the battery in an Apple Watch may seem like a difficult job, but this article will show you how to do it step by step. It will emphasize on how to handle the watch properly to keep it safe and safeguard your own safety. If you want a reliable, professional touch, Mr Fix is a trusted expert in fixing Apple Watches and will get your device back to its best functioning.

Things You Need to Do

If you want to change the battery on your Apple Watch yourself, you’ll need some special tools to make sure the process goes smoothly and safely. The appropriate tools can make a big difference.

These are the most important tools and supplies you’ll need:

The Pentalobe Screwdriver is an important tool for opening the small screws on Apple gadgets.

Plastic Opening Tool: A tiny, non-marring tool made to safely pry open the delicate watch face without leaving any scratches.

Tweezers: You can’t do without precision tweezers when you need to work with small connectors and cables inside the watch.

Replacement Battery (specific to Apple Watch model): This is perhaps the most important part. Make sure you get a battery that is made just for your Apple Watch model, like the Series 3, Series 5, or SE. Using the wrong battery can cause problems with compatibility or even harm.

Adhesive Strips or Glue (optional for resealing): After you change the battery, you’ll need to reseal the watch to keep it water-resistant and keep dust out. It is best to use high-quality adhesive strips or a specific watch glue.

When looking for new batteries and tools, make sure to choose vendors who are well-known and trusted so that you get parts that are high-quality and reliable. Cheap batteries that don’t have a brand name can often cause more problems or be dangerous.

How to Change the Battery in Steps

To change the battery in your Apple Watch, carefully follow these procedures. Throughout this process, you need to be patient and precise.

Step 1: Turn Off Your Apple Watch

Before you start any repairs, you need to turn off your Apple Watch completely. This stops short circuits from happening by accident and keeps the parts within safe.

Press and hold the side button until the power off slider shows up on the screen.

To switch off your device fully, slide the power off slider to the right.

Take the band off your Apple Watch to make it easier to work on.

Step 2: Warm up the display to loosen the glue.

A powerful glue holds the Apple Watch screen in place. Gently heating the edges of the watch makes this glue softer, which makes it easier to open without breaking it.

Gently warm the edges of the display with a hairdryer or heat gun set to low. For around 30 to 60 seconds, move the heat source around the edge of the watch in a steady motion.

Warning: Don’t let the device become too hot. Too much heat can hurt the battery and display, as well as other parts inside. The idea is to warm up the glue, not the watch itself.

Step 3: Take the Watch Face Off

You need to be very careful during this stage so you don’t damage the fragile internal cables that connect the display to the watch’s logic board.

Carefully put the plastic opening tool into the little space between the watch casing and the display once the glue has been softened. Start on one of the watch’s thinner sides.

Carefully pull the display away from the watch body. Don’t use too much force. You might hear a small popping sound as the glue comes apart.

Once you make a little space, carefully move around the boundaries. Be very careful because there are still a lot of tiny ribbon connections connecting the display.

Once the screen is partially raised, carefully pull apart any cords that are linked with tweezers. To completely separate the display, you usually have to unplug one or two cords. Be very careful with these cables because they are quite weak.

Step 4: Take out the old battery

You can now get to the old battery by carefully opening the display and unplugging the cords.

Find the battery within the casing of the watch. Most of the time, it’s a rectangle.

Carefully and gently use the plastic opening tool to lift the battery connector from the logic board. Don’t use metal tools because they could short-circuit parts.

Once the battery is unplugged, carefully pull it out of its compartment. Carefully lift it up with the plastic tool if it is stuck to something. Do not bend or puncture the old battery because it could start a fire.

Step 5: Put in the new battery

Putting in the new battery is pretty much the opposite as taking it out.

Carefully install the new battery in the right spot in its container.

Carefully plug the new battery into the logic board, making sure that the connector clicks into position. Before moving ahead, make sure the connection is strong.

Step 6: Put the display back on

This is an important step in putting your Apple Watch back together and making sure it works and is sealed properly.

Carefully plug the display cords back in that you took out before. Use your tweezers to make sure that each cable is securely in place.

Put the screen in line with the watch body. Check to see that all the edges are lined up correctly.

If you’re using adhesive strips, carefully put additional strips around the edge of the watch body before putting the display back in place. If you use glue, make sure to put on a thin, even coat.

Gently press the display back into the watch body, making sure it fits snugly and evenly. Put uniform, mild pressure around the edges to make sure the glue makes a strong seal.

Step 7: Turn on the power and test

It’s time to test your work after everything is put back together.

Press and hold the side button to turn on the watch.

Make that the battery works by showing a charge and holding it as it should.

Make sure that the display is properly aligned and that all touch functions and buttons work.

Safety Tips and Things to Do

Your Apple watch may experience different issues. It’s risky to try to fix a fragile item like the Apple Watch yourself. Your safety and the safety of your device should come first.

Don’t ever pierce the battery: Apple Watch batteries are lithium-ion. If you poke them, they can leak, catch fire, or even blow up. Be very careful with the battery.

Use anti-static tools because static electricity might hurt delicate electronic parts. To avoid electrostatic discharge (ESD), use anti-static instruments and operate on a surface that doesn’t carry electricity whenever you can.

Put on safety goggles since little pieces can fly off or problems can come up that you didn’t predict. It’s always a good idea to wear safety goggles to protect your eyes.

Don’t operate on metal surfaces; instead, work on a surface that doesn’t conduct electricity. A wooden table or a specific anti-static carpet is best.

Get Help from a Professional If you’re not sure about a step, run into problems you didn’t foresee, or don’t have the necessary tools, it’s always safer to stop and get help from an expert. Trying to force a repair can cause harm that can’t be fixed.

Why should you choose Mr Fix to replace the battery in your Apple Watch?

This tutorial gives you step-by-step directions for fixing your Apple Watch yourself, but because it’s so complicated, it’s usually recommended to hire a professional. At Mr. Fix Electronics, we know how much your gadget means to you, and we offer a better, stress-free battery replacement service.

Expert experts: Our staff is made up of highly trained and experienced experts who know how to fix Apple Watches. They know how to work with all Apple Watch models, so every replacement is accurate and safe.

excellent-Quality Batteries: The replacement batteries we use are only those that are long-lasting and of excellent quality, and they meet or surpass the criteria set by the original equipment manufacturer (OEM). This makes sure that your Apple Watch works at its best and lasts as long as possible.

Quick Turnaround: We realize you use your Apple Watch every day. Most of the time, we can replace your battery the same day, so you can have your smartphone back swiftly and easily.

We believe in fair and open pricing that is also affordable. You will get a transparent quote with no extra fees, so you can be sure that you are getting a good deal.

We guarantee our repairs. We guarantee all of our repairs, so you can be sure of their quality and that you will be completely happy with them.

Common Problems and How to Fix Them

Even when done carefully, DIY repairs might sometimes cause problems that you didn’t expect. Here are some typical problems and several ways to fix them:

Display Won’t Reattach Securely: This happens a lot when the old glue wasn’t completely removed or the new glue wasn’t put on right. Make sure the surfaces are clean and use new, high-quality adhesive strips. If the problem keeps happening, the display frame may be slightly twisted. In such a case, you need to get help from Mr Fix.

The watch won’t turn on when you replace it: First, make sure that the new battery is securely attached to the logic board. A loose connection is sometimes to blame. If the connection is strong, the new battery may be broken or the logic board may be broken.

Conclusion

Changing the battery in your Apple Watch can make it work better and last longer. You can try to fix this yourself by carefully following the steps in this guide and putting safety first. Keep in mind how important it is to be careful with fragile parts and to be aware of the risks that come with them.

Mr Fix offers reliable, stress-free Apple Watch battery replacement services for people who want peace of mind and the confidence of experienced craftsmanship. Our specialists are highly trained, dedicated to quality, and quick to help, so you can be confident your equipment is in good hands.

Don’t let a dead battery stop you. Call Mr Fix today to set up a time for a professional Apple Watch battery replacement. Your device will work like new again. 

FAQs

Q: Is it okay to use any battery to replace my Apple Watch?

No, you must use a battery that is made for your Apple Watch model (like the Series 6 or Series 8). Using the wrong battery might make your device not work, make it run poorly, or even break it.

Q: How long does it take to change the battery?

Depending on how good you are at fixing things and which model of Apple Watch you have, a do-it-yourself replacement can take anywhere from 30 minutes to an hour. Many repairs at Mr Fix are done the same day, thus their professional services are typically speedier.

Q: Will changing the battery cancel my warranty?

Yes, if you replace your own battery, you will probably lose any warranty you have with Apple. However, many professional repair firms, like Mr Fix, offer their own guarantees on the work they do, which gives you peace of mind.