Samsung Galaxy Watch4 Battery Replacement

Written By: Adriana Zwink
  • Comments: 12
Samsung Galaxy Watch4 Battery Replacement

Difficulty

Moderate

Steps

12

Time Required

20 - 45 minutes

Introduction

Use this guide to replace a worn-out or dead battery in your Galaxy Watch4.

If your battery is swollen, take appropriate precautions. For your safety, discharge your battery below 25% before disassembling Galaxy Watch4. This reduces the risk of a dangerous thermal event if the battery is accidentally damaged during the repair.

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

    • Remove the watch band.

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    • Use a Tri-point Y000 screwdriver to remove the four 4.0 mm-long screws.

    The correct tool to use here is a tri-point Y00 screwdriver.

    David C -

    What if 2 won't come out?

    Sharon Shelton -

    Yes this step needs to be edited as the correct tool is y00 not y000. I think I stopped my brand new y000 before I figured it out.

    Ryan Stokes -

    Definitely 00

    Andrew -

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

    • Twist the opening tool to create a gap.

    • Don't try to remove the back cover all the way yet. The sensor flex cable is still connected to the motherboard.

    That isn't glue holding the cover in place. That is the rubber gasket used to waterproof the device. It WILL get damaged and you WILL have to replace it.

    David C -

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    • Lay the watch face down.

    • Carefully swing open the back cover by folding the back cover to the opposite site of the created gap.

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

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    • Remove the back cover.

    • Make sure the rubber gasket is undamaged. If damaged, replace it with a new one during reassembly to maintain proper water resistance.

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    • Use a Phillips screwdriver to remove the 4.4 mm-long screw securing the motherboard.

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    • Use the flat end of a spudger to disconnect the display flex cable.

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    • Use a spudger to disconnect the flex cable of the crown buttons.

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    • Use your fingers to lift the motherboard out from the watch assembly towards the bottom of the watch.

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    • Place the tip of an opening pick 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.

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

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    • 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.

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    • Remove the battery.

Conclusion

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. Press the new battery firmly into place.

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%.

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

Adriana Zwink

Member since: 18/12/19

47713 Reputation

7 comments

Will this same battery work for the 42mm Galaxy Watch 4 Classic? Or will I need to keep searching for a replacement for that model?

geeowens -

No! The batteries are completely different sizes.

David C -

Guide worked very well for me on the Watch4 (not classic). My battery adhesive came off during the replacement, so it was good to have gotten the adhesive card just in case.

My only note is that the Y000 Tri-point was tool small for the 2nd step. I used the Y00 Tri-point and it worked perfectly. The battery did take some effort to get out. I also used the flat edge of the plastic spudger to help lever up the corner to slide the pick in better.

Chris -

is it still water resistant

Victor Rhebok -

It's sad and insanely corrupt that Samsung designed this watch to make changing the battery a long, delicate, tedious and potentially hazardous process. It would have been easy for them to simply design the watch with the battery being the FIRST thing you encounter when you take off the back! They clearly want people to simply buy a new watch when the thing can't hold a charge. This is planned obsolescence and, frankly, should be illegal. Obviously that also applies to all kinds of products/devices from other manufacturers as well. It's a damned shame that so many things wind up polluting landfills because they are designed to be virtually unable to be maintained and/or repaired.

Nick Lento -

Will the Samsung Galaxy watch 5 pro or regular battery fit in the four for longer life aren't they the same size

Michel Bergeron -