Samsung Galaxy S21 Battery Replacement

Completely power off your phone before starting.

Do not proceed without a fully powered-down device.

• Apply heat for 2 minutes to the bottom edge of the back cover using an iOpener or an alternative heat source such as a hair dryer, heat gun, or hot plate.
• Beware of overheating: the display and internal battery can be damaged by excessive heat, and the plastic back cover is also vulnerable.

• Apply a suction cup to the phone's back, centered on the bottom edge.
• Pull up with strong force until a gap forms between the cover and frame.

Older phones may be difficult; apply more heat for better results or try again.

• Insert an opening pick into the gap, but only up to 5 mm to avoid damage.

Slide the pick back and forth along the bottom edge to cut through the adhesive.

Leave the pick in place to prevent the adhesive from resealing.

Apply heat from a iOpener to the left edge of the back cover for 2 minutes.

Apply suction cup near left edge of phone's back.

• Pull up on suction cup with strong force to create gap.
• Insert opening pick into gap, but not more than 5 mm.

Exceeding 5 mm may damage internal components.

Insert an opening pick at the top of the left edge and slide it down towards the bottom left corner, cutting the adhesive.

Avoid cutting past where the camera shell meets the back cover to prevent cracking the plastic.

Leave the pick in place to maintain separation between the components.

Heat the iOpener and apply it to the right edge of the back cover for exactly 2 minutes.

Apply a suction cup to the back of the phone near the center of the right edge.

• Pull up on the suction cup with strong, steady force to create a gap between the back cover and frame.
• Be cautious not to damage secondary interconnect cable (parallel to right edge)

Insert the opening pick only 3 mm into the gap to avoid damaging the interconnect cable.

Insert an opening pick at the right edge of the back cover.

• Slide the pick back and forth to cut the adhesive.
• Leave the pick in place to prevent resealing.

Insert the right-edge opening pick into the top-right corner of the phone.

• Rotate the pick clockwise around the corner to create a gap in the screen.
• Limit insertion depth to 5 mm to avoid damaging internal components.

Do not apply this procedure to the top-left corner, where the rear-facing camera is located.

Insert the top-most opening pick into the gap closest to the camera, working carefully not to damage surrounding components.

• Next, insert the left-edge pick as close to the edge of the device as possible.

Apply iOpener to the camera shell for 2 minutes.

Rotate the back cover counterclockwise to create a gap between the camera shell and the frame.

• Insert the pick up to no more than 5 mm to avoid scratching the camera.
• Use the opening pick in the created gap.

If this method fails, proceed to the next step for an alternative solution. Otherwise, skip it and continue with the original plan.

Risk of cracking the plastic back cover. Use caution.

• Slide two picks under the corners of the back cover, adjacent to the camera shell.
• Maintain the gap and move the picks back and forth between the back cover and the camera shell.

Insert an opening pick between the camera shell and frame to separate the adhesive.

Multiple heat applications may be required due to significant adhesive holding the frame in place.

Be cautious not to scratch the phone's flash area with the pick.

Cut through the additional adhesive to the right of the camera using a suitable tool.

• Angle the pick downward to avoid damaging any components when approaching the back cover.

Align the opening pick with your phone's flash.

• Insert the pick slowly, avoiding the flash's plate.
• If necessary, angle the pick downward to prevent it from slipping into the plate.
• Slice the adhesive to the right of the camera.

Remove the back cover.

• If the back cover is stuck, use a pick to gently pry it loose around the edges.

Do not continue until you have powered off your phone and removed any residual power sources.

• Power on your phone and test all functions before reassembling.
• Remove any adhesive chunks with a pair of tweezers or your fingers.
• Clean away adhesive residue with high concentration (over 90%) isopropyl alcohol.

For Samsung custom-cut adhesives, consult the specific guide provided.

If using double-sided tape, follow the instructions in a separate guide.

Remove the motherboard bracket using a Phillips screwdriver by unscrewing five 4 mm-long screws.

• Carefully track each removed screw.
• Ensure each screw returns to its original position for proper reassembly.

Do not touch the internal components while working.

• Use a pair of tweezers to gently pull up on the motherboard bracket.
• Unclip the bracket from the frame but do not remove it yet, as it's still attached to the wireless charging coil.

Hold the motherboard bracket aside with tweezers or your fingers.

• Pry up the battery press connector using a spudger, applying pressure only under its edge to avoid damaging the socket and surrounding components.

Do not press down on the middle of the connector — risk of pin damage.

Re-attach by aligning and pressing one side until it clicks, then repeat on the other side.

Hold the motherboard bracket aside with one hand.

• Pry up the wireless charging coil's press connector using a spudger.
• Disconnect the prised connector.

Peel the wireless charging coil away from the phone using your fingers.

• During reassembly, refasten the motherboard bracket screws first to properly align the charging coil.
• Firmly press the rest of the wireless charging coil down to adhere it.

• Remove the six 4 mm Phillips screws using a Phillips screwdriver.

Insert the point of a spudger into the notch in the top-left corner of the loudspeaker.

• Pry up to release the clips holding it in place.
• Remove the loudspeaker.

Insert the flat-end of a spudger under the press connector.

• Pry up on the connector while gently wiggling it back-and-forth.
• The primary interconnect cable should now be disconnected.

• Insert the flat end of a spudger into the press connector.
• Pry gently to release the secondary interconnect cable.

Use the flat end of a spudger to gently pry up on the secondary interconnect cable's press connector.

• Pry up on the primary interconnect cable's press connector using the same technique.

Remove the secondary and primary interconnect cables using tweezers or your fingers.

Disconnect the display cable's bottom press connector with a spudger.

Disconnect the display cable's top press connector using a spudger.

Remove the display cable using tweezers or your fingers.

Do not puncture or bend the battery during removal.

• Apply 1-2 drops of high concentration (over 90%) isopropyl alcohol to the gaps surrounding the battery's perimeter.
• Apply more if necessary, but avoid overflooding which may damage the motherboard or daughterboard and display.

If struggling to remove, try applying more isopropyl alcohol before repeating the removal attempt.

• Position a suction cup near the right edge, centered for best grip.
• Insert an opening pick into the widest frame-battery gap on the edge.
• Rotate and align the opening pick with its long edge inserted into the gap.

Apply suction cup firmly and use an opening pick to pry up.

If battery does not separate easily, add 1-2 drops of isopropyl alcohol.

Do not reinstall a damaged or deformed battery as it poses a potential safety hazard.

• Remove and discard the old battery, ensuring all remaining adhesive is peeled off.
• Wait ten minutes after cleaning with isopropyl alcohol before installing the new battery to allow complete evaporation.

Temporarily reconnecting the battery to the motherboard helps with alignment, but ensure it's disconnected once seated.

• Secure the new battery with pre-cut adhesive or double-sided tape at its designated locations in the device, not directly on the battery.
• Press the new battery firmly into place for proper seating.