Samsung Galaxy Watch4 Classic Battery Replacement

Written By: Adriana Zwink
  • Comments: 8
Samsung Galaxy Watch4 Classic 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 Classic.

If your battery is swollen, take appropriate precautions. For your safety, discharge your battery below 25% before disassembling your Galaxy Watch4 Classic. 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 Y00 screwdriver to remove the four 4.0 mm-long screws securing the back cover.

    The y000 screw driver is not right. Tip is too long and doesn't engage screw correctly causing them to strip

    Christopher W Warnecke -

    I found I needed to use a Y00 screw for this.

    RashKash103 -

    Confirmed the Y00 is what you need for this step.

    drenizzle -

    Yea, it stripped my screws, now i cant replace my battery i have to buy a whole new watch Y000 is false news

    Randal Jones -

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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.

    I suggest to work the plastic pry tool between one of the pairs of spurs that hold the wrist bands on. It worked much more easily for me than working at either side of the watch. ~Rufus T. Montgomery

    Rufus T. Montgomery -

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    • Lay the watch face down.

    • Carefully swing open the back cover by folding it 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 the pointed end of a spudger to disconnect the hall sensor flex cable.

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    • Use a spudger to disconnect the display flex cable.

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    • Use a spudger to disconnect the crown button flex cable.

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

    what size Phillips head?

    Angela -

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

    • During reassembly, make sure none of the flex cables become trapped underneath the motherbaord.

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    • The battery is held in place with light adhesive.

    • Place the flat end of a spudger 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.

    • Take care not to puncture or bend the battery with your tool—a punctured or bent battery may leak dangerous chemicals or cause a thermal event.

    • 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.

    • 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

2 comments

What kind of battery does it use?

Dylan -

The directions are perfect! I had very little issue following your instructions.

One point I would make is that there seems to be more of an available gap to pry the back off of the watch located between the pairs of wristband spurs where there is very little gap on the sides. After almost 20 minutes of trying to get the little plastic tool to work the back off, I looked closely at the area between the spurs and it looked more promising. A couple of probes with the tool, and the the back started right off. The rest is history. Thanks!!!

Rufus T. Montgomery -