Apple Watch Ultra Battery Replacement

Written By: Dominik Schnabelrauch

Comments: 3

Difficulty

Difficult

Steps

Time Required

1 - 2 hours

Introduction

Use this guide to replace a worn-out or dead battery in your Apple Watch Series Ultra.

There is a significant chance that you may break the OLED panel during this procedure. Be sure to apply plenty of heat and be extremely careful during the prying stage.

You’ll need replacement adhesive to reattach the screen when reassembling the device. Your device will function normally, but will most likely lose its IP6X (Ingress Protection) rating.

Tools

Parts

Apple Watch Ultra Battery

Step 1

Drain your watch battery below 25% before starting this repair. A charged battery may catch fire if damaged.
Take your watch off the charger and power it down.
If your touchscreen is broken and you can't power off the watch, use this alternate method to power it down.

Step 2

Because the gap between the screen assembly and frame is so small, a thin metal tool is needed to pry the screen up. Read the following warnings before you start disassembly:
Protect your fingers by keeping them completely clear of the front end of your tool. You can protect your free hand with a heavy glove, such as a leather shop glove or gardening glove.
Be careful not to apply too much pressure, as this might cause the iFlex to slip and cut you, or damage the watch.
Wear eye protection. The glass may break, sending pieces flying.
Attach or remove the watch bands as needed to provide more control as you make repairs.

Step 3

Heat an iOpener and apply it to the screen for two minutes to loosen the adhesive underneath.
You can also use a hair dryer, heat gun, or hot plate, but be careful not to overheat the watch—the screen and internal battery are both susceptible to heat damage.

Step 4

Place the tip of an iFlex along the edge opposite the Digital Crown and position it in the seam between the screen and the frame.
Press the iFlex firmly straight down into the gap.
The gap between the screen and the frame is very small, and it makes inserting the iFlex difficult. Don't force the iFlex in, or you risk damaging the screen. If you're having trouble, apply more heat and try again.

Step 5

Use the iFlex to pry up the screen.
The adhesive requires time and constant force to loosen—it probably won't loosen from the initial pry. Reheat the screen and keep applying constant force until the adhesive loosens.

Step 6

Insert an opening pick in the gap you created between the screen and the frame.
Remove the iFlex.

Step 7

Insert the tip of the opening pick less than 2 mm to prevent damaging the antenna pin.
Slide the opening pick around the top left corner and along the top edge of the watch to slice the screen adhesive.

Step 8

Insert the tip of the opening pick less than 2 mm to prevent damaging the antenna pin.
Slide the opening pick around the top right corner and stop just before the Digital Crown.

Step 9

Insert an opening pick into the seam at the top left corner of the watch.
Slide the pick along the Action button edge to slice the adhesive.

Step 10

Slide the opening pick around the bottom left corner and along the bottom edge of the watch to slice the screen adhesive.

Step 11

Slide the opening pick around the bottom right corner and stop before you reach the side button.

Step 12

Insert the opening pick between the screen and frame at the opposite edge of the Digital Crown.
Pry up the screen until you can get a good grip with your fingers.
Don't try to remove the screen all the way yet. It's still connected to the watch body.

Step 13

Be careful not to strain the screen cable when you swing open the screen.
Lift the screen up and carefully pull it towards the Digital Crown.
Swing the screen open to an upward position.

Opening the watch like this is just bad and ridiculous advice!

Would not recommend to open it with a steel wedge in a 90 degrees angle.

Or are you guys going to sell screens hoping on some broken screens?

Only way, at home, is with a small enough suction cup. This is just stupidity.

If you manage not breaking the screen you are going to damage the watch anyway with this method.

Hire some engineers iFixit!

Ferdi Mendes - 27/09/22

Hi Ferdi,

On the guide team, we've completed two successful screen separations (out of two) with this procedure with the screen intact and watch undamaged, so we can confirm that this is a valid method. Is it the most foolproof method? Probably not! We'll revise this guide when we find better tools and procedures. I'll also add a precautionary warning in the introduction for all of these guides.

The process is actually not as difficult as some of the other smartwatches. Patience is key. You must allow the adhesive to thoroughly heat up and apply constant pressure in order to loosen the adhesive.

The screen assembly is actually very strong! The sapphire glass is very durable. In the teardown video, we damaged the screen's OLED panel because we didn't give the adhesive enough time to loosen (the top glass was undamaged!) The rigid adhesive likely pulled against the OLED panel underneath the top glass and cracked it. This would happen whether you used a blade or a suction cup.

Arthur Shi -

Step 14

Use a Y000 driver to remove the two 2.3 mm‑long screws securing the metal connector bracket at the bottom edge of the watch.

Step 15

Use a pair of tweezers to remove the bottom connector bracket.

Step 16

Use the point of a spudger to pry up the battery connector towards the battery.
During reassembly, this is a good point to power on your device and test all functions before sealing it up. Be sure to power your watch back down completely before you continue working.

Step 17

Use a Y000 driver to remove the 2.9 mm‑long screw securing the battery.
Use a Y000 driver to unscrew the 2.1 mm‑long screw that's sandwiched between the metal bracket.

Step 18

Use a pair of tweezers to remove the bracket with the screw sandwiched between it.
Although the screw sits nicely in the bracket, it’s not captive and can fall out.

Step 19

Use an opening pick to lift up the battery.
Remove the battery from the case.
Don't reinstall a damaged or deformed battery, as doing so is a potential safety hazard.

Conclusion

If possible, turn on your device and test your repair before installing new adhesive and resealing.

To reassemble your Apple Watch Ultra, follow these instructions in reverse order. Apply a little bit of high isopropyl alcohol (>90%) to a Q-tip or use a cleaning pad to gently remove the leftover adhesive on the edges of the watch case and the screen before installing new adhesive.

For optimal performance, calibrate your newly installed battery after completing this guide.

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

Author

Dominik Schnabelrauch

Member since: 23/11/16

201162 Reputation

One comment

Is it possible to reboot the device after changing the battery so that my i cloud account is locked?

Fazza -