Apple Watch Series 7 Battery Replacement

Written By: Dominik Schnabelrauch

Comments: 8

Apple Watch Series 7 Battery Replacement

Difficulty

Moderate

Steps

Time Required

30 - 50 minutes

Introduction

Use this guide to replace a worn-out or dead battery in your Apple Watch Series 7.

Note: The battery replacement procedure for the 41 mm Series 7 Apple Watch differs slightly from the 45 mm version. This guide shows how to replace the battery for both sizes.

Before you begin, make sure you have the appropriate replacement battery for your watch. You will only need a Tri-point Y000 screwdriver during the battery replacement in the 45 mm model.

If your battery is swollen, take appropriate precautions. For your safety, discharge your battery below 25% before disassembling your device. This reduces the risk of fire if the battery is accidentally damaged during the repair.

This guide shows the procedure on the cellular/LTE version of the watch, but the GPS-only version is similar.

You’ll need replacement adhesive to reattach components when reassembling the device.

Tools

Parts

Step 1

Before starting repairs, 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 and watch body is so thin, a sharp blade is needed to separate the two. Read the following warnings carefully before proceeding.
Protect your fingers by keeping them completely clear of the knife. If in doubt, 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 knife to slip and cut you, or damage the watch.
Wear eye protection. The knife or glass may break, sending pieces flying.
Attach or remove the watch band as needed to provide more control as you make repairs.

Step 3

Prepare an iOpener and apply it to the screen for at least two minutes to loosen the adhesive underneath.
A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the watch—the display and internal battery are both susceptible to heat damage.
You may need to reheat the iOpener and repeat this procedure several times until the display adhesive softens.

Can confirm that if you want this to work, pop the iopener in for around 45seconds and then let it sit on the watch for 6 minutes, 2 minutes is just not enough.

Jeremiah Yoder -

Step 4

Be aware that a sharp tool easily scratches your watch housing when not handled with care. To avoid undesired scratches, take your time and work carefully rather than hastily.
Place the edge of a curved blade into the thin gap between the display and the outer case. Start at the short side of the display, most distant to the digital crown.
Once inserted, tilt the blade to pry the display open slightly and create a gap between the screen and the watch body.
The Apple Watch Series 7 display is equipped with a plastic bezel on its rear side. If you want to reuse your display, avoid using too much pressure with the knife or you may separate the bezel from the screen.

Tried this for almost an hour, and I could not lift the display off at all. Broke the screen and chipped pieces of the screen as well.

Excalibert89 -

Yeah prolly gonna suggest an actual spudger for this step, or to be more detailed. Kept reheating the IOpener every 10mins keeping the watch under it for 5mins etc and it never budged after 3 hours of fiddling. Eventually broke the fine edge of the blade and scratched the casing, now the blade can't catch the groove and $8 down the drain.

Jeremiah Yoder -

Step 5

Insert an opening pick in the gap your created.
Slide the opening pick along the short edge of the watch to slice the adhesive.

Step 6

Slide the opening pick around the corner and along the long edge on the opposite side of the watch crown to slice the display adhesive.

Step 7

Slide the opening pick around the corner to slice the remaining adhesive on the short edge of the watch next to the watch crown.
Don't try to remove the display. It is still connected to the watch assembly.

Step 8

Be careful not to strain the display cables when you fold the display to the side.
Lift the display and carefully pull it towards the watch crown.
Swing the display open to an upward position.

Step 9

Prepare an iOpener and apply it to the rear side of your Apple Watch for at least two minutes to loosen the adhesive underneath the battery.
A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the watch—the display and internal battery are both susceptible to heat damage.

Step 10

From this point, the battery removal procedure for the 41 mm watch differs slightly from the 45 mm version.
If you're replacing the battery for a 41 mm watch, continue with this step.
If you're replacing the battery for a 45 mm watch, continue with this step.

Step 11

The following six steps show how to remove the battery from a 41 mm Apple Watch Series 7.
Insert an opening pick between watch body and the long edge of the battery.
Use constant, steady pressure to slowly pry up the battery.
Take care not to puncture or bend the battery with your tool—a punctured or bent battery may leak dangerous chemicals or cause a fire.
Don't try to remove the battery all the way yet. It is still connected to the motherboard.

Step 12

The battery flex cable is long enough to allow you to place the battery outside the watch housing, but avoid straining or folding the the cable sharply when you lift the battery out of its recess.
Carefully lift and swing the battery out of its recess and place it next to the watch body.

Step 13

Use a pair of tweezers to peel the black protective tape off the ZIF connector.
Make sure to only peel the tape off the connector but avoid to remove it completely. Otherwise you have to replace the tape during reassembly.

Step 14

Use one arm of your tweezers or the pointed end of a spudger to pry up the lock bar on the ZIF connector securing the battery cable.

Step 15

Use a pair of tweezers to pull the battery cable out of the battery ZIF connector.
During reassembly make sure to push the cable all the way back into the ZIF connector before locking the it. Reapply the black tape on top of the connector to secure the battery cable or replace it with new one. Otherwise the battery cable may slip out of the connector and your watch won't turn on.

Step 16

Remove the battery.
Do not reuse the battery if it has been deformed or damaged, as doing so is a potential safety hazard. Replace it with a new battery.
If you're reusing your old battery during reassembly, you can reuse the existing adhesive to secure the battery during reassembly.
Secure a new battery with pre-cut adhesive or double-sided adhesive tape. In order to position it correctly, apply the new adhesive into the device at the places where the old adhesive was located, not directly onto the battery. Press the new battery firmly into place.

Step 17

The following six steps show how to remove the battery from a 45 mm Apple Watch Series 7.
Insert an opening pick between watch body and the long edge of the battery.
Use constant, steady pressure to slowly pry up the battery.
Take care not to puncture or bend the battery with your tool—a punctured or bent battery may leak dangerous chemicals or cause a fire.
Don't try to remove the battery all the way yet. It is still connected to the motherboard.

Not a very good approach. Damaged back cover flex cable using triangular opening pick.
Battery is well glued to motherboard and opening pick has just too little contact point.

Better to start with metal prying tool from taptic engine side adding some drops of isopropyl alcohol from time to time.

And of course take your time.

Valdek Kangert -

Step 18

The battery flex cable is long enough to allow you to place the battery outside the watch housing, but avoid straining or folding the the cable sharply when you lift the battery out of its recess.
Carefully lift and swing the battery out of its recess and place it next to the watch body.

Step 19

Use a Tri-Point Y000 screwdriver to remove the 1.1 mm-long screw securing the battery connector bracket.

Step 20

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

Step 21

Use a spudger to disconnect the battery cable by prying the connector straight up from its socket.

Step 22

Remove the battery.
Do not reuse the battery if it has been deformed or damaged, as doing so is a potential safety hazard. Replace it with a new battery.
If you're reusing your old battery, you can reuse the existing adhesive to secure the battery during reassembly.
Secure a new battery with pre-cut adhesive or double-sided adhesive tape. In order to position it correctly, apply the new adhesive into the device at the places where the old adhesive was located, not directly onto the battery. Press the new battery firmly into place.
During reassembly apply new adhesive where necessary after cleaning the relevant areas with isopropyl alcohol (>90%).

Conclusion

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

To reassemble your device, follow these instructions in reverse order.

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

4 comments

Is it still waterproof after that? I swim daily. Watch is 2.5 years old doing great but the battery is at 76%.

Will the adhesive on the screen seal back up good enough?

Matt Reason -

Hi Matt,
retaining water resistance after the repair depends on how clean the mating surfaces are and how accurately the adhesive is reapplied. Your device will lose its factory-given IP (Ingress Protection) rating. Personally I wouldn‘t advise to go swimming with the watch after resealing it with tape.

Dominik Schnabelrauch -

if the socket that the battery plugs into breaks, is that something worth paying to fix, or should i just buy a new watch?

river D -

Bravissimo,tutto molto chiaro.

Aldo Sammartano -