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Use this guide to replace a worn-out or dead battery in your Xiaomi Mi 9.
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.
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Before you begin, switch off your phone.
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Apply a heated iOpener to the rear glass to loosen the adhesive beneath the edges. Apply the iOpener for at least two minutes.
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Secure a suction handle to the lower edge of the rear glass, as close to the edge as possible.
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Lift the rear glass with the suction handle to create a gap between the glass and the frame.
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Insert an opening pick into the gap.
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Slide the opening pick to the bottom right corner of the phone.
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Insert a second opening pick and slide it to the bottom left corner to cut the adhesive.
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Leave the opening picks in place to prevent the adhesive from resealing.
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Insert a third opening pick at the bottom left corner.
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Start to slide the opening pick from the bottom left corner along the side of the Xiaomi Mi 9 to cut the adhesive.
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Leave the opening pick in the top left corner to prevent the adhesive from resealing.
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Insert a fourth opening pick under the top left corner of the rear glass.
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Slide the opening pick along the top to cut the adhesive.
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Leave the opening pick in the top right corner to prevent the adhesive from resealing.
Be very careful at this point not to raise the cover too much, at the slightest bending the glass shatters. It just happened to me :(
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Insert a fifth opening pick at the top right corner of the phone.
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Slide the opening pick along the right edge to cut the remaining adhesive.
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Carefully lift the rear glass and remove it.
Il y a un peu d'adhésif autour de l'appareil photo, c'est pour cela que ça peu forcer un tout petit peu.
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Remove the ten Phillips #00 screws (3 mm length) that secure the motherboard cover.
Note, the Explorer/Transparent edition does not use phillips #00 screws.
It uses 0.8mm star screws(P2 Pentalobe in the iFixIt store)
Thanks for mentioning Jason!
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Insert an opening pick at the top right corner of the motherboard cover.
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Twist the opening pick sideways to pry up and slightly lift the motherboard cover.
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Carefully remove the motherboard cover including the charging coil / NFC antenna.
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Use a spudger to pry up and disconnect the battery flex cable.
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Remove the seven Phillips #00 screws securing the loudspeaker unit:
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Four silver 3.2 mm long screws
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Two yellowish 3.8 mm long screws
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One black 2.8 mm long screw
I found that there was no need to remove the loudspeaker assembly at all. The battery adhesive was easy to pull out (by rolling it up on a screwdriver) without needing to remove the loudspeaker.
I can confirm this. Worked like a charm without taking the loudspeaker assembly out.
Ich stellte fest, dass es überhaupt nicht nötig war, die Lautsprecherbaugruppe zu entfernen. Der Batteriekleber ließ sich leicht herausziehen (durch Aufrollen mit einem Schraubenzieher), ohne dass der Lautsprecher entfernt werden musste.
Gegenteilig sogar! Das Antennenkabel löste sich und hat dann außerordentlich viel Zeit gekostet den Stecker zu reparieren!! -
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Slide an opening pick under the right side of the loudspeaker unit.
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Twist the opening pick sideways to pry up the loudspeaker unit until you can get a good grip.
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Carefully lift the loudspeaker unit and hinge it open towards the left side.
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crwdns2935267:0crwdne2935267:0Tweezers$4.99
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Use a pair of tweezers to pry off and disconnect the antenna cable from the loudspeaker unit.
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Remove the loudspeaker unit.
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crwdns2935267:0crwdne2935267:0Tweezers$4.99
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Use a pair of tweezers to peel the black ends of the adhesive tabs off the battery.
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crwdns2935267:0crwdne2935267:0Plastic Cards$2.99
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Use a pair of tweezers to pull out the left adhesive tab from underneath the battery.
Be careful with this one. My fully charged battery catch fire.
I tried to forcefully remove the battery after ripping the adhesive tab. I was bending it a lot.
It started to burn and smoke a lot. I didnt get any burn wounds but it left some nasty marks on the floor even though I throw it out on the balcony after 1 second.
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Use a pair of tweezers to pull out the right adhesive tab from underneath the battery.
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Use an opening pick to pry the battery out of its recess until you can get a good grip.
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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.
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.
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Is it possible to swap mi 9 battery with mi 9 pro battery?
yes I'm also interested. is it the same size? would like to replace with larger battery
What type is the antenna plug?
Mine got damaged
Hi Marcel,
the Antenna connector is a COAX connector. You can find a little more information here.
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?
Im also experiencing this issue. How can I fix this?
Same. Did ya'll figure it out? Going to buy a new battery to see if that helps.
You must calibrate your new battery as above instructions.
Vielen Dank für die ausführliche Anleitung. Das hat mir 60€ Montagekosten bei Saturn erspart :) Gruß Iris
I change my battery but it seams that the quick charge has gone from 65% to 100%. Why?
You need to calibrate the new battery, the android software still thinks it has the old battery installed.
Superb guide, thank you! Battery replacement went very well and the iFixit Mi9 battery is superb quality.
In the section what do you need. Gluestrips for the battery should be included
What width glue strips do I need?
I just did it with 1mm strips, put two of them on each sides to be secured but I believe 2mm would have been more appropriate.
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