Phone · Samsung · Galaxy S21 FE
Samsung Galaxy S21 FE Battery Replacement
Battery Replacement guide for the Samsung Galaxy S21 FE
Before you begin
Tools
- Precision screwdriver set
- Plastic opening tools
- Tweezers
- Heat gun or iOpener
- Suction handle
- Plastic opening card
- Nylon spudger
Parts / materials
- Galaxy S21 FE replacement battery
- Battery adhesive strips
- Back panel replacement adhesive tape
- Isopropyl alcohol
Safety
- Discharge battery below 25% before disassembly to reduce thermal event risks.
- Wear protective eyewear to guard against glass debris and hot surfaces.
- Never use sharp metal tools directly against the lithium battery pouch.
Overview
Step-by-step
- 1
Power Off and Eject SIM Tray
2 minInsert a SIM eject tool into the hole at the bottom frame to pop out the SIM tray. Turn off the device completely before proceeding.
- 2
Heat Rear Cover Edges
3 minApply a heated iOpener or heat gun to the edges of the rear panel for two minutes to soften the adhesive.
- 3
Attach Suction Handle
2 minPlace a suction cup near the bottom edge of the rear panel. Pull up gently on the handle to create a small gap along the seam.
- 4
Insert Opening Pick
2 minInsert a plastic opening pick into the gap created at the bottom edge. Leave it in place to keep the seam open.
- 5
Slice Rear Panel Adhesive
4 minSlide the opening pick around the perimeter of the phone to cut through the remaining adhesive tape.
- 6
Remove Rear Panel
1 minLift the plastic rear panel straight up and remove it from the frame.
- 7
Unscrew Motherboard Cover
4 minUse a Phillips #00 screwdriver to remove the 15 screws securing the motherboard cover and lower speaker module.
- 8
Disconnect Wireless Charging Coil
2 minUse a plastic spudger to pop the wireless charging coil press connector up from the motherboard.
- 9
Remove Upper Midframe
2 minPry up and remove the top plastic midframe containing the wireless charging pad.
- 10
Disconnect Battery Cable
1 minPry the battery connector directly upward from its socket on the motherboard to disconnect power.
- 11
Disconnect Interconnect Cables
3 minUse a spudger to disconnect both ends of the main display and interconnect flex cables.
- 12
Apply Adhesive Remover
3 minApply a few drops of isopropyl alcohol around the edges of the battery well to soften the underlying glue.
- 13
Lever Out Old Battery
4 minSlide a wide plastic card under the bottom edge of the battery and lift gently to release the glue bond.
- 14
Remove Old Battery
1 minLift the battery out of the frame completely, taking care not to bend or puncture it.
- 15
Clean Battery Well
2 minWipe the interior battery housing with isopropyl alcohol to remove all old adhesive residue.
- 16
Apply New Battery Adhesive
2 minPeel the backing off the replacement adhesive strips and apply them flush into the battery compartment.
- 17
Install New Battery
3 minPlace the new battery into the well and press down firmly across the surface to set the adhesive.
- 18
Reassemble Components
5 minReconnect the flex cables and battery press connector, then reinstall the upper midframe and tighten the 15 Phillips screws.
After your Samsung Galaxy S21 FE battery replacement
Power the Galaxy S21 FE back on and test the battery replacement function before you put every screw away. Check touch/display response, charging, cameras, buttons, and wireless as relevant to this repair. If something fails after closing the device, reopen carefully and reseat the connectors for this Samsung Galaxy S21 FE job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.
Keep learning
Explore more Samsung Galaxy S21 FE repair context in the encyclopedia, or open related DIY guides.
