Xiaomi Mi 8 Battery Replacement

Apply heat to the rear glass with an iOpener for 2 minutes.

• Target the edges of the rear glass where the adhesive is located.
• The iOpener should be kept on the adhesive for at least 2 minutes to loosen it.

Secure a suction handle to the lower rear glass edge, as close as possible.

• If the glass is cracked, use strong tape or superglue to attach the suction handle and allow it to cure.

A cracked glass may prevent proper suction. Apply caution when using strong tape or superglue.

Lift the rear glass with the suction handle, creating a gap between the glass and frame.

• Insert an opening pick into the gap.

If the glass doesn't budge, apply more heat to soften the adhesive. Follow iOpener instructions to avoid overheating.

Slide the opening pick to the bottom right corner of the phone.

• Insert a second opening pick at the bottom left corner.
• Slide it down to cut the adhesive completely.

Leave both opening picks in place to prevent resealing of the adhesive.

Insert a third opening pick at the bottom left corner.

• Slide the opening pick along the side, starting from the bottom left corner, to cut the adhesive.

• Be cautious of the fingerprint flex cable and only insert the tip of the opening pick.

• If the adhesive becomes too hard to cut, reheat it with your iOpener if necessary.

• Leave the third opening pick in place at the top left corner to prevent resealing of the adhesive.

• Position a fourth opening pick under the top left corner of the rear glass.
• Slide the opening pick along the top edge to break the adhesive seal.

• Leave the opening pick in the top right corner to prevent resealing.

Insert a fifth opening pick at the top right corner of the phone.

• Slide the opening pick along the right edge to cut the remaining adhesive.
• Do not remove the rear glass yet, as the fingerprint flex cable remains connected to the motherboard.

Careful not to break the rear glass.

• Lift the rear glass with both hands.
• Fold the glass to the left for better access.
• The fingerprint flex connector should now be exposed.

Use a spudger to pry up and disconnect the fingerprint flex cable.

• Rear glass removal:
• Disconnect and remove the rear glass.
• Prepare for reassembly by thoroughly cleaning the glued areas with isopropyl alcohol and a lint-free cloth, removing any remaining adhesive.

Apply pressure to the rear glass for several minutes after installation to ensure proper bonding. A stack of heavy books on top of the phone can help.

Remove 10 screws securing the motherboard cover using a Phillips screwdriver.

• Eight Phillips #00 x 3.4mm screws
• Two Phillips #00 x 3.5mm screws

Insert an opening pick under the right side of the motherboard cover.

• Pry tool upwards with a gentle twisting motion.
• Lift the motherboard cover up slightly to create clearance for further access.

Remove the motherboard cover, including the NFC antenna, with care.

Locate the battery flex cable at the bottom of the motherboard.

• Pry up the battery flex cable using a spudger.
• Disconnect the battery flex cable from the motherboard.

Remove the tweezers from their holder and use them to carefully peel back the black ends of the adhesive tabs attached to the battery.

Risk of torn adhesive tab — use gentle twisting motion with tweezers when removing.

• Pull out the adhesive tab slowly and steadily at a flat angle.
• If needed, twist the tab around the tweezers to prevent ripping.

Remove the adhesive tab holding the battery in place by pulling it away from the device.

Remove the second adhesive tab from underneath the battery using a pair of tweezers.

If an adhesive tab rips, use isopropyl alcohol or heat to loosen it before prying out the battery with an opening pick or plastic card.

Insert an opening pick or plastic card into the battery's recess.

Pry carefully around the edges to dislodge the battery from its holder, ensuring a secure grip before proceeding.

Do not reuse a deformed or bent battery as it poses a safety hazard.

Replace it with a new battery.

• Remove any remaining adhesive from the midframe using isopropyl alcohol and a lint-free cloth.
• Clean the glued areas thoroughly before applying new adhesive.