Xiaomi Poco M3 Battery Replacement

Risk of damage if SIM card tray gasket is damaged or missing.

• Insert a SIM card eject tool or paperclip into the small hole in the SIM card tray, near top left corner.
• Press firmly to eject the SIM card tray.
• Remove the SIM card tray by pulling it out of the phone assembly.
• If a SIM card is present, it will fall out easily.

When reinserting the SIM card, ensure correct orientation inside the SIM card tray.

A rubber gasket around the SIM card tray provides water and dust protection. Replace if damaged or missing to protect internal components.

Do not insert the spudger at a flat angle — risk of damaging the charging port.

Insert the spudger into the charging port at a steep angle.

• Pry the back cover away from the bottom edge of the screen using the spudger as a gap opener.

Insert opening pick between phone assembly and back cover.

• Remove spudger.

• Insert an opening pick into the bottom left corner of the phone.
• Apply gentle pressure along the edge, moving it to release the plastic clips at the bottom left corner.

Run a pick along the left edge of the phone, releasing the plastic clips.

• Slide the opening pick around the top left corner to release the plastic clips.
• Continue sliding it along the top edge of the phone to release the remaining clips.

Do not touch or damage the flex cable — it may be damaged if pulled too hard.

• Slide the opening pick around the top right corner until the plastic clips release.
• Leave the opening pick inserted above the volume buttons.
• Avoid applying pressure near physical buttons, as there is a flex cable that can be easily damaged.

Insert another opening pick into the gap at the bottom edge.

• Slide the opening pick around the bottom right corner to release the plastic clips.
• Continue along the right edge, stopping just below the fingerprint reader.

Remove the opening picks.

• Flip the phone over.

• Avoid stretching the fingerprint flex cable.

• Swing the back cover up from the right side, like opening a book.

Remove the ten 3.9 mm screws using a Phillips #00 screwdriver.

• Insert an opening pick at the bottom right corner of the motherboard cover.
• Slide the opening pick along the right edge to release the plastic clips.
• At the top right, twist the opening pick counter-clockwise to pry up the motherboard cover.

Remove the motherboard cover.

Use the flat end of a spudger to pry up the fingerprint sensor cable from the bottom left corner of the motherboard.

• Be careful not to damage the surrounding components.

• Remove the back cover assembly.

Locate the battery cable at the bottom right corner of the motherboard.

• Use the flat end of a spudger to pry up and disconnect the battery cable.

Do not puncture or bend the battery, as this can lead to chemical leaks or thermal events.

• Peel the top edge of the orange adhesive strip (A) off the battery using blunt nose tweezers or a clean fingernail.
• Repeat for the bottom edge, peeling the adhesive strip labeled with an A away from the battery.
• Fold down the remaining adhesive strip (A).

Remove the B-sticker using either blunt-nose tweezers or your finger.

Locate both corners of the orange adhesive strip labeled with an A.

• Pull upwards on the orange adhesive strip to lift the battery out of its recess.
• Swing the battery to an upright position.

Adhesive tabs may require some force to remove; apply heat from a iOpener if necessary for assistance.

Peel the battery off the remaining adhesive.

• Remove the battery.
• During reassembly, temporarily reconnect the battery to the motherboard for alignment.
• Disconnect the battery after it is seated.

Peel the battery's adhesive sticker off the midframe.

Mandatory for display replacement, recommended to use a fresh adhesive sticker with new battery installation.