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crwdns2944351:0crwdnd2944351:0Samsung Galaxy S21 Ultra Battery Replacementcrwdnd2944351:0crwdne2944351:0

crwdns2933797:0Dominik Schnabelrauchcrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Dominik Schnabelrauch

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Samsung Galaxy S21 Ultra
Type
replacement
Thing
Battery
Title
Samsung Galaxy S21 Ultra Battery Replacement
Introduction
Use this guide to replace a worn-out or dead battery in your Samsung Galaxy S21 Ultra.
If your battery is swollen, [[What to do with a swollen battery|take appropriate precautions|new_window=true]].
***For your safety, discharge your battery below 25% before disassembling your phone.*** This reduces the risk of a dangerous thermal event if the battery is accidentally damaged during the repair.
You’ll need replacement adhesive to reattach components when reassembling the device.
Time Required Min
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Time Required Max
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Imageid
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Difficulty
Moderate
Conclusion
If possible, turn on your device and test your repair before installing new adhesive and resealing.
[guide|113604|Secure the new battery with pre-cut adhesive|new_window=true] 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.
Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings from the new part before installing.
***To reassemble your device, follow these instructions in reverse order.*** During reassembly apply new adhesive where necessary after cleaning the relevant areas with isopropyl alcohol (>90%).
For optimal performance, [[Battery Calibration|calibrate your newly installed battery|new_window=true]] after completing this guide.
Take your e-waste to an [[E-Waste|R2 or e-Stewards certified recycler|new_window=true]].
Repair didn’t go as planned? Try some [[Troubleshooting Problems After a Repair|basic troubleshooting]], or ask our Answers community for help.
Author
Dominik Schnabelrauch
Public
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