How to Replace the Battery on the Apple Watch Ultra (DIY Repair Guide)

Does your Apple Watch Ultra (model numbers: A2684, A2622, A2859) shut down unexpectedly before the battery reaches 1%? Does the battery drain exceptionally fast, take longer than normal to charge, or overheat while charging? If you’re experiencing any of these symptoms, it’s time to replace the battery.

In this Apple Watch Ultra DIY battery repair tutorial, we show you how to replace the worn-out battery with new OEM spares without technical skills or expertise. You will find all the tools required for this repair and original replacement parts below.

Want to get your device repaired by a professional? Send us your Apple Watch Ultra, and our repair ninjas will restore it to peak working condition. Follow the link, select all the issues you’re experiencing, and click See Estimated Total to view the total repair cost instantly.

Repair Difficulty

Moderate / Requires 30-45 minutes to complete.

This repair involves handling precision instruments, such as a flexible pry tool, a nylon spudger, a screwdriver, and a heat gun. You need to be careful not to damage delicate internal cables and circuit boards. You don’t need prior experience or technical skills to complete this repair. With a bit of patience and attention to detail, you can replace the battery on the Apple Ultra Watch yourself.

Replacement Parts You’ll Need

Restore the form and functionality of your Apple Watch Ultra with original replacement parts. Select the OEM spares from the drop-down menu below and bring your device back to peak working condition.

• Apple Watch Ultra 1st 49MM (LTE) Repair Replacement Spare (Titanium) - Parts

• Apple Watch Ultra Back Cover + OLED Screen Fix Repair - Kit

Get an OEM replacement battery for your Apple Watch Ultra today. Click the link to visit our store, then scroll down to the Customers Also Add section to purchase the original replacement part and the tools you’ll need for this repair at a discount.

Tools You’ll Need

Before starting the Apple Watch Ultra battery replacement, gather the following tools. Using the correct instruments will help you complete the repair successfully, without damaging delicate internal components, including cables, circuit boards, and connector ports. We used the following tools and recommend them for a safe, professional-quality DIY Apple Watch Ultra battery replacement at home.

• Flexible Pry Tool
• Nylon Spudger
• Joe’s 50-in-1 Screwdriver Set
• Heat Gun
• Joe’s Isopropyl Alcohol
• Joe’s RTV Silicone Glue
• Precision Tweezers
• Heat-proof Anti-skid Rubber Work Mat

Not ready to invest in tools yet? Find your device in our repair catalog, select the issues it’s experiencing, and send it to us. Our repair ninjas will restore your device to peak working condition.

Step-by-Step DIY Guide to Replacing the Battery on the Apple Watch Ultra at Home

In this detailed DIY repair guide, we show you how to replace the worn-out battery on the Apple Watch Ultra yourself. Follow each step carefully and use the accompanying images as a visual guide to complete the repair with confidence.

Step 1: Separate the Display from the Watch Body

1.1. Set the heat gun to approximately 170°C (338°F) and heat the edge of the screen for roughly a minute and a half.

1.2. Insert a flexible pry tool in the seam between the display screen and the watch body and gently pry upward from all four sides to separate the two halves. Dip the pry tool in isopropyl alcohol frequently to help dissolve the adhesive quickly. Be very careful not to crack the screen.

Step 2: Disconnect the Worn-out Battery

2.1. Using a Y-tip 0.8mm screwdriver available in our Joe’s 50-in-1 screwdriver set, unfasten the 4 small screws holding the battery and store them safely. You may need to bend the metal plate over the top-left screw using precision tweezers to gain access.

2.2. Disconnect the battery connector, remove the battery, and set it aside.

Step 3: Install a New Battery

3.1. Align the new battery with the slot in the watch body and fasten the 4 screws. Remember to bend the metal plate back over the top-left screw. Once done, connect the ribbon cable.

Step 4: Reassemble the Apple Watch Ultra

4.1. Clean the adhesion surface with isopropyl alcohol to remove dust and ensure a waterproof seal.

4.2. Apply fresh adhesive on the watch body along the edge where the screen will sit. Do not apply glue to the display.

4.3. Align the screen with the watch body and press down for a secure fit. Use a rubber band or plastic spring clamp to apply pressure while the adhesive cures.

Congratulations! Your Apple Watch Ultra is Ready to Use

You have successfully replaced the battery on the Apple Watch Ultra with original spare parts. Wait at least 24 hours for the glue to cure before using the device. Test the charging function, Bluetooth pairing, and button response to ensure the device is working properly.

If you found this guide helpful and would like to try your hand at DIY gadget repair, visit our store for essential tools and spare parts. You can also check out our at-home DIY smartwatch repair guides for other popular brands, including Apple, Fitbit, Garmin, and Samsung.

Have questions or suggestions about this repair? Text a repair ninja or email us, and we’ll reply shortly.