Featured

Featured Guide

Difficulty

Moderate

Steps

9

Time Required

                          45 minutes - 1 hour

Sections

3

  • Opening the Galaxy Watch3
  • 4 steps
  • Motherboard
  • 3 steps
  • Battery
  • 2 steps

Flags

1

This guide has been found to be exceptionally cool by the iFixit staff.

  • BackSamsung Galaxy Watch3

  • Full Screen

  • Options

  • History

  • Save to Favorites

  • Download PDF

  • Edit

  • Translate

  • Get Shareable Link

  • Embed This Guide

  • Notify Me of Changes

  • Stop Notifications

Introduction

You’ll need replacement adhesive to reattach a new battery when reassembling the device.

What you need

Step 1

              Unfasten the back cover screws
  • Before starting repairs, take your watch off the charger and power it down.
  • Use a Tri-point Y00 driver to unfasten the four screws on the back of the watch.
  • Don’t worry about removing the screws, they will stay in place in the back cover.

Before starting repairs, take your watch off the charger and power it down.

Use a Tri-point Y00 driver to unfasten the four screws on the back of the watch.

Don’t worry about removing the screws, they will stay in place in the back cover.

1024

Step 2

              Wedge open the back cover
  • Insert an opening tool between the back cover and the metal housing.
  • Twist the opening tool to create a wider gap.
  • Don’t fully remove the back cover just yet. The sensor flex cable is still connected to the motherboard.

Insert an opening tool between the back cover and the metal housing.

Twist the opening tool to create a wider gap.

Don’t fully remove the back cover just yet. The sensor flex cable is still connected to the motherboard.

Step 3

              Disconnect the sensor flex cable
  • Lay the watch face down.
  • Carefully lift the back cover up from the edge with the buttons to access the sensor connector.
  • Use the flat end of a spudger to pry up and disconnect the sensor flex cable from the motherboard.

Lay the watch face down.

Carefully lift the back cover up from the edge with the buttons to access the sensor connector.

Use the flat end of a spudger to pry up and disconnect the sensor flex cable from the motherboard.

Step 4

              Remove the back cover
  • Remove the back cover.
  • Make sure the rubber gasket (marked red) is undamaged. If damaged replace it with a new one during reassembly to maintain proper water resistance.

Remove the back cover.

Make sure the rubber gasket (marked red) is undamaged. If damaged replace it with a new one during reassembly to maintain proper water resistance.

Step 5

              Unplug the three connectors
  • Use the flat end of a spudger to disconnect the flex cables of the side buttons, the display and the hall sensor.

Use the flat end of a spudger to disconnect the flex cables of the side buttons, the display and the hall sensor.

Step 6

              Unfasten the motherboard screw
  • Remove the Phillips #00 screw.

Remove the Phillips #00 screw.

Step 7

              Remove the motherboard
  • The motherboard is held in place by two small plastic clips.
  • Use a pair of blunt tweezers to lift the motherboard out from underneath the plastic clips towards the buttons.
  • Remove the motherboard.

The motherboard is held in place by two small plastic clips.

Use a pair of blunt tweezers to lift the motherboard out from underneath the plastic clips towards the buttons.

Remove the motherboard.

Step 8

              Lever up the battery
  • Place the flat end of a supdger in the small gap between the plastic frame and the battery, opposite to the display cable.
  • Carefully lever the battery up and out of its recess.
  • The battery is adhered to the core with light adhesive, so take your time.
  • Don’t try to remove the battery completely yet, as its connector is still adhered to the core.

Place the flat end of a supdger in the small gap between the plastic frame and the battery, opposite to the display cable.

Carefully lever the battery up and out of its recess.

The battery is adhered to the core with light adhesive, so take your time.

Don’t try to remove the battery completely yet, as its connector is still adhered to the core.

Step 9

              Remove the battery
  • Lift the battery up a little in order to access its glued down connector cable.
  • Use a pair of blunt tweezers to lift up the battery connector which is secured with some light adhesive.
  • You will most likely be able to re-use the adhesive to fix the new battery in place. If not replace it with double sided or pre-cut adhesive tape.
  • Remove the battery.

Lift the battery up a little in order to access its glued down connector cable.

Use a pair of blunt tweezers to lift up the battery connector which is secured with some light adhesive.

You will most likely be able to re-use the adhesive to fix the new battery in place. If not replace it with double sided or pre-cut adhesive tape.

Remove the battery.

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

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

For optimal performance, calibrate your newly installed battery: Charge it to 100% and keep charging it for at least 2 more hours. Then use your device until it shuts off due to low battery. Finally, charge it uninterrupted to 100%.

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

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

Cancel: I did not complete this guide.

                                                                                      9 other people completed this guide.

Author

                                      with 1 other contributor 


                    Tobias Isakeit

Member since: 03/31/2014

105,397 Reputation

                                      184 Guides authored                  



                       Badges:
                       46







                                                        +43 more badges

Team

                       iFixit                        

                                                  Member of iFixit 



                    Community                     


                                            141 Members                     


                                            15,772 Guides authored

Jeremy Salazar - Aug 14, 2021

Reply

Once I had the correct tools and replacement battery, fixing was easy. Tyvm!

Gilberto Garcia - Sep 28, 2021

Reply

One question, where can I find an authorized battery for this watch? or one that you highly recommend. Thanks.

**Edit - Your store doesn’t have a 45mm battery for my Galaxy Watch 3. Only 42 and 46.

Tobias Isakeit - Nov 18, 2021

The 42 and 46 mm models are the first Galaxy Watch sizes. We ’re working on getting the Watch3 batteries and parts but it may take some time.

Andrey Irnazarov - Nov 29, 2021

Reply

Hi, is it possible to put the battery from samsung watch 472mAh, on samsung watch 3, instead of 340mAh?

Tobias Isakeit - Dec 1, 2021

Hi Andrey, short answer is no—although basically a good idea. But even if you cut the battery contact plate to fit (cut off the part with the alignment hole) its polarity is inverted. The Watch3 contact plate has -/+ (noted under the cable) whereas the original has +/-. Also the original Galaxy Watch battery is much bigger than the one in the Watch3. So it won’t fit inside the recess. Here is an image with the Watch3 battery on top of the original battery.