Einleitung
Use this guide to remove or replace the battery on your Xiaomi Redmi Note 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.
You’ll need replacement adhesive to reattach components when reassembling the device.
Werkzeuge
Ersatzteile
-
-
Insert a SIM card eject tool, a SIM eject bit, or a straightened paper clip into the hole on the SIM tray located at the left edge of the phone.
-
Press directly into the hole to eject the SIM card tray.
-
Remove the SIM card tray.
-
-
-
Prepare an iOpener and apply it to the back cover for at least two minutes to loosen the adhesive underneath.
-
-
-
Secure a suction handle to the bottom edge of the screen, as close to the edge as possible.
-
Lift the phone assembly with the suction handle to create a small gap between the assembly and the back cover.
-
Insert an opening pick in a steep angle into the gap you created. This might require some force.
-
Slide the opening pick to the bottom right corner to slice the adhesive and release the plastic clips holding the back cover in place.
-
-
-
Insert a second opening pick in a steep angle at the bottom edge of your phone.
-
Slide the opening pick to the bottom left corner to release the plastic clips and to slice the adhesive.
-
Leave the opening picks in place to prevent the adhesive from resealing.
-
-
-
Insert a third opening pick in a steep angle at the bottom left corner of your phone.
-
Slide the opening pick along the left edge of your phone to release the plastic clips and slice the adhesive.
-
Leave the opening pick in the top left corner to prevent the adhesive from resealing.
-
-
-
Insert a fourth opening pick in a steep angle at the bottom right corner of your phone.
-
Slide the opening pick along the right edge of your phone to release the plastic clips and slice the adhesive.
-
Leave the opening pick in the top right corner to prevent the adhesive from resealing.
-
-
-
Flip your Redmi Note 9 over.
-
Carefully fold the back cover to the right side of the phone assembly like you would open a book from the back.
-
Slide the back cover underneath the phone assembly so that the phone assembly overlaps about one third of the back cover and the fingerprint cable is not strained.
-
-
-
Use a Phillips screwdriver to remove the eleven 3.9 mm-long screws securing the motherboard cover.
-
-
-
Insert the tip of an opening pick underneath the bottom left edge of the motherboard cover.
-
Pry up the motherboard cover.
-
-
-
Use a spudger to disconnect the fingerprint cable by prying the connector straight up from its socket.
-
Separate the phone assembly from the back cover.
-
-
-
Use a spudger to disconnect the battery cable by prying the connector straight up from its socket.
-
-
-
Use a spudger to disconnect the display cable by prying the connector straight up from its socket.
-
-
-
Use a spudger to disconnect the interconnect cable by prying the connector straight up from its socket.
-
-
-
Fold the display and the interconnect flex cable towards the charging port in order to get free access to both battery pull tabs and the battery.
-
-
-
Use a pair of blunt nose tweezers or your finger to carefully bend the battery cable to the left to get free access to the left battery pull-tab.
-
-
-
Use a pair of blunt nose tweezers or a clean fingernail to peel down both battery adhesive pull-tabs to un-stick them from the top edge of the battery.
-
-
-
Grab the first pull-tab with a pair of blunt nose tweezers or your fingers and slowly pull it away from the battery and towards the bottom edge of your phone.
-
Pull hard enough to maintain tension on the strip, but don't force it. Give it plenty of time to stretch and un-stick from under the battery.
-
Don't press down on the battery. Hold the phone firmly by its sides.
-
Keep the strip flat and unwrinkled. Try to pull evenly on the whole strip, rather than pulling mainly in the middle or on one side.
-
Pull at a low angle so the strip doesn't snag on the edge of the battery.
-
-
-
Repeat the previous pull-tab removal procedure on the second pull-tab.
-
Follow the same procedure as with the previous strip: don't press down on the battery, keep the strip flat and unwrinkled, and pull at a low angle.
-
Wait about one minute for the alcohol solution to weaken the adhesive.
-
Use the flat end of a spudger to gently lift the battery.
-
If possible, turn on your device and test your repair before installing new adhesive and resealing.
For optimal performance, calibrate your newly installed battery after completing this guide.
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 device at the places where the old adhesive was located, not directly onto the battery. Press the new battery firmly into place.
Compare your new replacement part to the original part—you may need to transfer remaining components or remove adhesive backings from the new part before installing.
To reassemble your device, follow these instructions in reverse order. During reassembly apply new adhesive where necessary after cleaning the relevant areas with isopropyl alcohol (>90%).
Take your e-waste to an R2 or e-Stewards certified recycler.
Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.
