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Difficulty

Moderate

Steps

20

Time Required

                          45 minutes - 1 hour

Sections

3

  • Xiaomi Redmi Note 8 Opening Procedure
  • 8 steps
  • How to Disconnect the Battery in the Xiaomi Redmi Note 8
  • 5 steps
  • Battery
  • 7 steps

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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.

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

What you need

Step 1

              Heat the rear glass
  • Prepare an iOpener and apply it to the rear glass for at least two minutes to loosen the adhesive underneath.
  • A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the phone—the display and internal battery are both susceptible to heat damage.

Prepare an iOpener and apply it to the rear glass for at least two minutes to loosen the adhesive underneath.

A hair dryer, heat gun, or hot plate may also be used, but be careful not to overheat the phone—the display and internal battery are both susceptible to heat damage.

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Step 2

              Insert an opening pick
  • Secure a suction handle to the bottom edge of the rear glass, as close to the edge as possible.
  • If the 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 small gap between the back cover and the frame.
  • In case you have trouble creating a gap, apply more heat to further soften the adhesive. Follow the iOpener instructions to avoid overheating.
  • Insert an opening pick into the gap you created.
  • Slide the opening pick to the bottom right corner to slice the adhesive.
  • Leave the opening pick in place to prevent the adhesive from resealing.

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

If the 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 small gap between the back cover and the frame.

In case you have trouble creating a gap, apply more heat to further soften the adhesive. Follow the iOpener instructions to avoid overheating.

Insert an opening pick into the gap you created.

Slide the opening pick to the bottom right corner to slice the adhesive.

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

Step 3

              Slice the adhesive
  • Insert a second opening pick at the bottom edge of your phone.
  • Slide the opening pick to the bottom left corner to slice the adhesive.
  • Leave the opening picks in place to prevent the adhesive from resealing.

Insert a second opening pick at the bottom edge of your phone.

Slide the opening pick to the bottom left corner to slice the adhesive.

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

Step 4

              Slice the adhesive
  • If the adhesive becomes hard to cut, it has most likely cooled down. Use your iOpener for one to two minutes to reheat it.
  • Insert a third opening pick at the bottom left corner of your phone.
  • Slide the opening pick along the left edge of your phone to slice the adhesive.
  • Leave the opening pick in the top left corner to prevent the adhesive from resealing.

If the adhesive becomes hard to cut, it has most likely cooled down. Use your iOpener for one to two minutes to reheat it.

Insert a third opening pick at the bottom left corner of your phone.

Slide the opening pick along the left edge of your phone to slice the adhesive.

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

Step 5

  • Insert a fourth opening pick underneath the top left corner of your phone.
  • Slide the opening pick along the top edge to slice the adhesive.
  • Leave the opening pick in the top right corner to prevent the adhesive from resealing.

Insert a fourth opening pick underneath the top left corner of your phone.

Slide the opening pick along the top edge to slice the adhesive.

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

Step 6

  • Insert a fifth opening pick underneath the top right corner.
  • Slide the opening pick along the right edge of the rear glass to slice the remaining adhesive.
  • Don’t try to remove the rear glass all the way yet. The camera cover and fingerprint assembly is still adhered to its back.

Insert a fifth opening pick underneath the top right corner.

Slide the opening pick along the right edge of the rear glass to slice the remaining adhesive.

Don’t try to remove the rear glass all the way yet. The camera cover and fingerprint assembly is still adhered to its back.

Step 7

              Open your phone
  • Carefully fold the rear glass to the right side of the phone assembly like you’d open the back cover of a book.
  • Avoid straining the finger print cable during this procedure.

Carefully fold the rear glass to the right side of the phone assembly like you’d open the back cover of a book.

Avoid straining the finger print cable during this procedure.

Step 8

              Disconnect the fingerprint reader
  • Use a spudger to disconnect the fingerprint reader by prying the connector straight up from its socket.
  • Remove the rear glass assembly.

Use a spudger to disconnect the fingerprint reader by prying the connector straight up from its socket.

Remove the rear glass assembly.

Step 9

              Unfasten the motherboard cover screws
  • Use screwdriver to remove the eleven screws securing the motherboard cover:
  • Ten 3.9 mm-long Phillips screws
  • One 3.4 mm-long Phillips screw

Use screwdriver to remove the eleven screws securing the motherboard cover:

Ten 3.9 mm-long Phillips screws

One 3.4 mm-long Phillips screw

Step 10

              Pry up the motherboard cover
  • Insert the tip of an opening pick underneath the bottom left edge of the motherboard cover.
  • Do not insert the opening pick deeper than 3-4 mm to prevent damaging the motherboard.
  • Slide the opening pick along the left edge of the motherboard cover to unhinge the plastic clips and pry it up.

Insert the tip of an opening pick underneath the bottom left edge of the motherboard cover.

Do not insert the opening pick deeper than 3-4 mm to prevent damaging the motherboard.

Slide the opening pick along the left edge of the motherboard cover to unhinge the plastic clips and pry it up.

Step 11

  • Insert the tip of an opening pick underneath the bottom right edge of the motherboard cover.
  • Slide the opening pick along the right edge of the motherboard cover to unhinge the plastic clips and pry it up.

Insert the tip of an opening pick underneath the bottom right edge of the motherboard cover.

Slide the opening pick along the right edge of the motherboard cover to unhinge the plastic clips and pry it up.

Step 12

              Remove the motherboard cover
  • Remove the motherboard cover.

Remove the motherboard cover.

Step 13

              Disconnect the battery
  • Use a spudger to disconnect the battery cable by prying the connector straight up from its socket.

Use a spudger to disconnect the battery cable by prying the connector straight up from its socket.

Step 14

              Disconnect the interconnect flex cable
  • Use a spudger to disconnect the interconnect flex cable by prying the connector straight up from its socket.

Use a spudger to disconnect the interconnect flex cable by prying the connector straight up from its socket.

Step 15

              Disconnect the display flex cable
  • Use a spudger to disconnect the display flex cable by prying the connector straight up from its socket.

Use a spudger to disconnect the display flex cable by prying the connector straight up from its socket.

Step 16

              Free the battery
  • During the following steps, do not fold the cable sharply and only bend it to avoid cable damage.
  • Fold the display flex cable towards the charging port in order to get free access to the battery.
  • You might want to use a small piece of tape to temporarily stick the cable onto your working surface to avoid accidentally damaging it during the battery removal.
  • Repeat the previous step and fold the interconnect flex cable in direction of the charging port.

During the following steps, do not fold the cable sharply and only bend it to avoid cable damage.

Fold the display flex cable towards the charging port in order to get free access to the battery.

You might want to use a small piece of tape to temporarily stick the cable onto your working surface to avoid accidentally damaging it during the battery removal.

Repeat the previous step and fold the interconnect flex cable in direction of the charging port.

Step 17

              Remove the stretch-release adhesive
  • The battery is secured to the rear case with two pieces of stretch-release adhesive.
  • Use a pair of tweezers or a clean fingernail to peel down both battery adhesive pull-tabs to un-stick them from the bottom edge of the battery.
  • Don’t jab the battery with any sharp tools. A punctured battery may leak dangerous chemicals or catch fire.

The battery is secured to the rear case with two pieces of stretch-release adhesive.

Use a pair of tweezers or a clean fingernail to peel down both battery adhesive pull-tabs to un-stick them from the bottom edge of the battery.

Don’t jab the battery with any sharp tools. A punctured battery may leak dangerous chemicals or catch fire.

Step 18

              Remove the pull-tabs
  • Grab the right pull-tab with a pair of 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 Redmi 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.
  • If the adhesive strip breaks off, try to retrieve it using your fingers or blunt tweezers, and continue pulling—but do not pry under the battery.
  • If the adhesive breaks off underneath the battery and can’t be retrieved, continue with the next step.

Grab the right pull-tab with a pair of 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 Redmi 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.

If the adhesive strip breaks off, try to retrieve it using your fingers or blunt tweezers, and continue pulling—but do not pry under the battery.

If the adhesive breaks off underneath the battery and can’t be retrieved, continue with the next step.

Step 19

  • 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.
  • If the adhesive breaks off underneath the battery and can’t be retrieved, apply a few drops of high concentration (over 90%) isopropyl alcohol under the edge of the battery in the area of the broken adhesive strip(s).
  • Wait about one minute for the alcohol solution to weaken the adhesive.
  • Use the flat end of an opening pick or a plastic card to gently lift the battery.
  • Don’t try to forcefully lever the battery out. If needed, apply a few more drops of alcohol to further weaken the adhesive. Never deform or puncture the battery with your pry tool.

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.

If the adhesive breaks off underneath the battery and can’t be retrieved, apply a few drops of high concentration (over 90%) isopropyl alcohol under the edge of the battery in the area of the broken adhesive strip(s).

Wait about one minute for the alcohol solution to weaken the adhesive.

Use the flat end of an opening pick or a plastic card to gently lift the battery.

Don’t try to forcefully lever the battery out. If needed, apply a few more drops of alcohol to further weaken the adhesive. Never deform or puncture the battery with your pry tool.

Step 20

              Remove the battery
  • Remove the battery.
  • If there’s any alcohol solution remaining in the phone, carefully wipe it off or allow it to air dry before installing your new battery.
  • Do not reinstall a damaged or deformed battery, as doing so is a potential safety hazard.
  • During reassembly, temporarily reconnect the battery to the motherboard to help align it correctly. Disconnect the battery after it is seated.

Remove the battery.

If there’s any alcohol solution remaining in the phone, carefully wipe it off or allow it to air dry before installing your new battery.

Do not reinstall a damaged or deformed battery, as doing so is a potential safety hazard.

During reassembly, temporarily reconnect the battery to the motherboard to help align it correctly. Disconnect the battery after it is seated.

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.

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