Featured

Featured Guide

Difficulty

Moderate

Steps

20

Time Required

                          50 minutes - 1 hour

Sections

5

  • Rear Glass
  • 7 steps
  • Motherboard Cover with Charging Coil / NFC
  • 3 steps
  • Battery Disconnect
  • 1 step
  • Loudspeaker Unit
  • 4 steps
  • Battery
  • 5 steps

Flags

1

This guide has been found to be exceptionally cool by the iFixit staff.

  • BackMi 9

  • Full Screen

  • Options

  • History

  • Save to Favorites

  • Download PDF

  • Edit

  • Translate

  • Get Shareable Link

  • Embed This Guide

  • Notify Me of Changes

  • Stop Notifications

Introduction

If your battery is swollen, take appropriate precautions. 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.

Although it’s possible to remove the battery without removing the loudspeaker unit we recommend doing so to make the removal procedure easier.

You’ll need replacement adhesive to reattach components when reassembling the device.

What you need

Step 1

              Rear Glass
  • Before you begin, switch off your phone.
  • Apply a heated iOpener to the rear glass to loosen the adhesive beneath the edges. Apply the iOpener for at least two minutes.

Before you begin, switch off your phone.

Apply a heated iOpener to the rear glass to loosen the adhesive beneath the edges. Apply the iOpener for at least two minutes.

1024

Step 2

  • Secure a suction handle to the lower edge of the rear glass, as close to the edge as possible.
  • If the phone’s rear glass is cracked, the suction handle may not stick. Try lifting it with strong tape, or superglue the suction handle in place and allow it to cure so you can proceed.
  • Lift the rear glass with the suction handle to create a gap between the glass and the frame.
  • Insert an opening pick into the gap.
  • If you have trouble, apply more heat to further soften the adhesive. Follow the iOpener instructions to avoid overheating.
  • Slide the opening pick to the bottom right corner of the phone.

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

If the phone’s rear glass is cracked, the suction handle may not stick. Try lifting it with strong tape, or superglue the suction handle in place and allow it to cure so you can proceed.

Lift the rear glass with the suction handle to create a gap between the glass and the frame.

Insert an opening pick into the gap.

If you have trouble, apply more heat to further soften the adhesive. Follow the iOpener instructions to avoid overheating.

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

Step 3

  • Insert a second opening pick and slide it to the bottom left corner to cut the adhesive.
  • Leave the opening picks in place to prevent the adhesive from resealing.

Insert a second opening pick and slide it to the bottom left corner to cut the adhesive.

Leave the opening picks in place to prevent the adhesive from resealing.

Step 4

  • Insert a third opening pick at the bottom left corner.
  • Start to slide the opening pick from the bottom left corner along the side of the Xiaomi Mi 9 to cut the adhesive.
  • Be aware of the rear cameras and only insert the tip of the opening pick. As the adhesive cools down it gets harder to cut. If necessary use your iOpener to reheat it.
  • Leave the opening pick in the top left corner to prevent the adhesive from resealing.

Insert a third opening pick at the bottom left corner.

Start to slide the opening pick from the bottom left corner along the side of the Xiaomi Mi 9 to cut the adhesive.

Be aware of the rear cameras and only insert the tip of the opening pick. As the adhesive cools down it gets harder to cut. If necessary use your iOpener to reheat it.

Leave the opening pick in the top left corner to prevent the adhesive from resealing.

Step 5

  • Insert a fourth opening pick under the top left corner of the rear glass.
  • Slide the opening pick along the top to cut the adhesive.
  • Leave the opening pick in the top right corner to prevent the adhesive from resealing.

Insert a fourth opening pick under the top left corner of the rear glass.

Slide the opening pick along the top to cut the adhesive.

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

Step 6

  • 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.

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.

Step 7

  • Carefully lift the rear glass and remove it.
  • Before installing new adhesive and reassembly, remove any remaining adhesive from the phone, and clean the glued areas with isopropyl alcohol and a lint-free cloth.

Carefully lift the rear glass and remove it.

Before installing new adhesive and reassembly, remove any remaining adhesive from the phone, and clean the glued areas with isopropyl alcohol and a lint-free cloth.

Step 8

              Motherboard Cover with Charging Coil
  • Remove the ten Phillips #00 screws (3 mm length) that secure the motherboard cover.
  • There might be tamper proof sticker on some of the screws.

Remove the ten Phillips #00 screws (3 mm length) that secure the motherboard cover.

There might be tamper proof sticker on some of the screws.

Step 9

  • Insert an opening pick at the top right corner of the motherboard cover.
  • Twist the opening pick sideways to pry up and slightly lift the motherboard cover.

Insert an opening pick at the top right corner of the motherboard cover.

Twist the opening pick sideways to pry up and slightly lift the motherboard cover.

Step 10

  • Carefully remove the motherboard cover including the charging coil / NFC antenna.

Carefully remove the motherboard cover including the charging coil / NFC antenna.

Step 11

              Battery Disconnect
  • Use a spudger to pry up and disconnect the battery flex cable.

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

Step 12

              Loudspeaker Unit
  • Remove the seven Phillips #00 screws securing the loudspeaker unit:
  • Four silver 3.2 mm long screws
  • Two yellowish 3.8 mm long screws
  • One black 2.8 mm long screw
  • Some screws may be hidden beneath tamper proof stickers.

Remove the seven Phillips #00 screws securing the loudspeaker unit:

Four silver 3.2 mm long screws

Two yellowish 3.8 mm long screws

One black 2.8 mm long screw

Some screws may be hidden beneath tamper proof stickers.

Step 13

  • Slide an opening pick under the right side of the loudspeaker unit.
  • Twist the opening pick sideways to pry up the loudspeaker unit until you can get a good grip.

Slide an opening pick under the right side of the loudspeaker unit.

Twist the opening pick sideways to pry up the loudspeaker unit until you can get a good grip.

Step 14

  • There is still an antenna cable connected to the back of the unit.
  • Carefully lift the loudspeaker unit and hinge it open towards the left side.

There is still an antenna cable connected to the back of the unit.

Carefully lift the loudspeaker unit and hinge it open towards the left side.

Step 15

  • Use a pair of tweezers to pry off and disconnect the antenna cable from the loudspeaker unit.
  • Remove the loudspeaker unit.
  • Before reassembly check your old loudspeaker for components that might need to be transferred to the replacement part such as the antenna flex cable with its coax connector.

Use a pair of tweezers to pry off and disconnect the antenna cable from the loudspeaker unit.

Remove the loudspeaker unit.

Before reassembly check your old loudspeaker for components that might need to be transferred to the replacement part such as the antenna flex cable with its coax connector.

Step 16

              Battery
  • Use a pair of tweezers to peel the black ends of the adhesive tabs off the battery.

Use a pair of tweezers to peel the black ends of the adhesive tabs off the battery.

Step 17

  • Use a pair of tweezers to pull out the left adhesive tab from underneath the battery.
  • The adhesive tab underneath the battery can rip very easily. Make sure you pull out the tab in a slow and steady motion and in a flat angle. To prevent the adhesive tab from ripping, it’s helpfull to twist the strip around the tweezers.
  • In case one of the adhesive tabs rips and it‘s not possible to pull it out completely, you can use isopropyl alcohol or an heated iOpener to loosen the adhesive. After the adhesive is soft enough use a prying tool such as an opening pick or a plastic card to pry out the battery.

Use a pair of tweezers to pull out the left adhesive tab from underneath the battery.

The adhesive tab underneath the battery can rip very easily. Make sure you pull out the tab in a slow and steady motion and in a flat angle. To prevent the adhesive tab from ripping, it’s helpfull to twist the strip around the tweezers.

In case one of the adhesive tabs rips and it‘s not possible to pull it out completely, you can use isopropyl alcohol or an heated iOpener to loosen the adhesive. After the adhesive is soft enough use a prying tool such as an opening pick or a plastic card to pry out the battery.

Step 18

  • Use a pair of tweezers to pull out the right adhesive tab from underneath the battery.

Use a pair of tweezers to pull out the right adhesive tab from underneath the battery.

Step 19

  • Use an opening pick to pry the battery out of its recess until you can get a good grip.

Use an opening pick to pry the battery out of its recess until you can get a good grip.

Step 20

  • Remove the battery.
  • Reusing a deformed or bent battery after it has forcefully been removed, is a potential safety hazard. Replace it with a new battery.
  • Remove any remaining adhesive from the midframe, and clean the glued areas with isopropyl alcohol and a lint-free cloth before applying new adhesive.

Remove the battery.

Reusing a deformed or bent battery after it has forcefully been removed, is a potential safety hazard. Replace it with a new battery.

Remove any remaining adhesive from the midframe, and clean the glued areas with isopropyl alcohol and a lint-free cloth before applying new adhesive.

If possible, turn on your phone and test your repair before installing new adhesive and resealing the phone.

Secure the new battery with pre-cut adhesive or double-sided adhesive tape. In order to position it correctly, apply the new adhesive into the phone at the places where the old adhesive was located, not directly onto the battery. Press the new battery firmly into place.

For optimal performance, calibrate your newly installed battery: Charge it to 100%, and keep charging it for at least two more hours. Then, use it until it shuts off due to low battery. Finally, charge it uninterrupted to 100%

To reassemble your device, follow these instructions in reverse order.

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Check out our Answers community for troubleshooting help.

Cancel: I did not complete this guide.

                                                                                      37 other people completed this guide.

Author

                                      with 1 other contributor 


                    Dominik Schnabelrauch

Member since: 11/23/2016

158,135 Reputation

                                      649 Guides authored                  



                       Badges:
                       40







                                                        +37 more badges

Team

                       iFixit                        

                                                  Member of iFixit 



                    Community                     


                                            141 Members                     


                                            15,769 Guides authored

edwinyapeter - Dec 13, 2019

Reply

Is it possible to swap mi 9 battery with mi 9 pro battery?

Barbudo - Jan 12, 2020

Reply

yes I’m also interested. is it the same size? would like to replace with larger battery

Marcel - Mar 18, 2020

Reply

What type is the antenna plug?

Mine got damaged

Dominik Schnabelrauch - Mar 19, 2020

Hi Marcel,

the Antenna connector is a COAX connector. You can find a little more information here.

Andrew Blake - Apr 29, 2020

Reply

I’ve changed the battery but device has not started even I tried to charge for 1-2 hours..( charger, USB-C cable checked). Btw, the symptoms was like the device started to turn off on around 50% of battery life. And charged too fast in about 10-15 minutes by the original fast charger. What could happen?