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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.
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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
I found I needed to use a Y00 screw for this.
Confirmed the Y00 is what you need for this step.
Yea, it stripped my screws, now i cant replace my battery i have to buy a whole new watch Y000 is false news
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Insert an opening tool into the seam between the back cover and the metal housing.
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Twist the opening tool to create a gap.
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
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Lay the watch face down.
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Carefully swing open the back cover by folding it to the opposite site of the created gap.
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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.
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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.
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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 flat end of a spudger in the small gap between the plastic frame and the battery, opposite to the display cable.
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Carefully lever the battery up and out of its recess.
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crwdns2935267:0crwdne2935267:0Tweezers$4.99
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Lift the battery up a little in order to access its glued down connector cable.
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Use a pair of blunt tweezers to lift up the battery connector which is secured with some light adhesive.
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Remove the battery.
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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.
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.
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What kind of battery does it use?
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!!!
Is there any adhesive applied for the water resistance while installation of the battery ?
Instructions are perfect.
Evidence of water damage though in mine, so sprayed the crusty bits with electrical solvent cleaner. Nothing to loose.
It's powered back up with the new battery, so see how long it lasts.
If it gives problems time for a new watch.
Won't be wearing it again in the shower though.
It works better to first heat the watch slightly on the back with a hair dryer in step 3. then the rubber waterproof ring will come loose a bit and you can carefully open it. be careful not to damage the ring.
