The battery of your Xiaomi Poco discharges way to fast? Do you notice a significant drop in performance?

If the manufacturer's six-month warranty on the battery has already expired, it is worth replacing it yourself. In this detailed photo tutorial, we will show you step by step how to do it.

Once you open your device, the specified IP certification (protection against dust and water ingress) will expire.If your battery is inflated, keep in mind that the gas inside the battery is flammable and can escape. If you do not feel confident enough, have it replaced at a repair shop.

To avoid scratches on case and screen glass, make sure your workspace is clean and level.

We wish you good luck with your repair!

Required tools

  • Flat Picks

    Flat Picks

    You need a very flat tool such as a flat pick to pry out parts that are glued in place.

    €3.00 at the iDoc store
  • Heat gun

    Heat gun

    You can use a heat gun to heat parts that are glued on so they’re easier to remove. In most cases, you can also use a hairdryer.

    from €14.47 on Amazon
  • For storing screws

    For storing screws

    We recommend storing your screws so you don’t mix up the various screws and small parts.

    €8.00 at the iDoc store
  • iFlex opening tool

    iFlex opening tool

    Opening your smartphone can be a very delicate operation, especially if the glue is very persistent. The blade of the flexible but sturdy iFlex measures just 0.15 mm, so it fits in even the smallest gaps, such as between the screen and the frame. The practical iFlex is made of stainless steel and sits comfortably in the hand. This makes it the perfect assistant for every smartphone repair.

    €9.00 at the iDoc store
  • iPlastix

    iPlastix

    Do you want to open your smartphone or lever out large parts like the battery? Then the iPlastix with its large blade will help you. The practical assistant is made of flexible, especially sturdy plastic and lies comfortably in the hand. Thanks to its design, you can even get into smaller gaps, for example to lift the screen or to prevent it from sticking together again.

    €9.00 at the iDoc store
  • Plastic prying tool

    Plastic prying tool

    You need a flat plastic prying tool to disconnect the various plugs and connectors.

    €3.00 at the iDoc store
  • Suction cup

    Suction cup

    A suction cup is perfect for lifting smooth surfaces such as displays or rear glass panels.

    €3.00 at the iDoc store
  • Phillips PH00 screwdriver

    Phillips PH00 screwdriver

    You need the right screwdriver for removing PH00 screws.

    €11.00 at the iDoc store

Required replacement part

Show all replacement parts for the Xiaomi Poco X3 NFC 

Passendes Werkzeug

Mit unserem Werkzeug gelingt dir die Reparatur.

for €59.00

Getting started with the repair of your Xiaomi Poco X3 NFC

If you get stuck or have questions, you can post a comment. We’d be happy to help.

28 steps
  1. Switching off your Xiaomi Poco X3 NFC

    Xiaomi Poco X3 NFC - Switching off your Xiaomi Poco X3 NFC  01
    Xiaomi Poco X3 NFC - Switching off your Xiaomi Poco X3 NFC  02
    Xiaomi Poco X3 NFC - Switching off your Xiaomi Poco X3 NFC  03

    Use our checklist to test the basic functions of your Xiaomi Poco X3 NFC before repairing. This way you can check afterwards if your repair was successful.

    1. Press and hold the power button until the Power Off menu appears on the screen.
    2. Tap Power off in the displayed menu. Your smartphone will shut down within a few seconds.
  2. Heating up the back cover

    Xiaomi Poco X3 NFC - Heating up the back cover 01
    Xiaomi Poco X3 NFC - Heating up the back cover 02
    Used tools
    Heat gun

    The edge of the back cover is heavily glued. It is therefore essential to first heat it up sufficiently. Use a hot air device for this purpose, such as a heat gun or an ordinary hair dryer.

    Be careful not to burn your fingers after heating. It is best to heat the back cover only to the point where you can still touch it.
    1. Heat the edge of the back cover by running the hot air device evenly over it.
    Used tools
  3. Lifting up the back cover

    To create a narrow gap between back cover and display unit you need a flat, stable tool. We recommend the iFlex for this, since it has particularly sharp edges that can be easily inserted.

    1. Attach a suction cup to the lower edge of the back cover and pull it upwards. Insert the iFlex between the display unit and the back cover at the same time.
    Used tools
  4. Detaching the back cover

    The back cover is glued separately around the camera module. Be especially careful when removing the back cover at this point to avoid damaging the camera module with your tool.

    To avoid damaging the edge of the case with the sharp edges of the iFlex, you should switch to a plastic tool like the iPlastix as soon as possible.

    1. Drive the tool completely around the edge of the back cover to loosen it piece by piece.
    2. Slide flat picks under the back cover at regular intervals, so that the glue cannot bond again.
    Used tools
  5. Removing the back cover

    Xiaomi Poco X3 NFC - Removing the back cover 01
    Xiaomi Poco X3 NFC - Removing the back cover 02
    1. Once the back cover is completely detached, you first have to remove all plastic picks.
    2. Then unfold it and put it aside.
  6. Unscrewing the plastic cover

    • 11 × 3.9 mm Phillips

    Use a screw storage to keep an overview during the repair and avoid losing anything. Use an old sewing box, for example. With our high-quality magnetic pad, you have the additional advantage that nothing slips.

    1. Loosen the eleven Phillips screws from the plastic cover above the motherboard.
    2. Then put them on your magnetic pad.
  7. Removing the plastic cover

    Xiaomi Poco X3 NFC - Removing the plastic cover 01
    Xiaomi Poco X3 NFC - Removing the plastic cover 02
    Xiaomi Poco X3 NFC - Removing the plastic cover 03
    Used tools

    The camera module is embedded in the plastic cover. To avoid detaching it accidentally, you should hold it in place with your finger when removing the cover.

    1. Carefully lever the plastic cover upwards, so that the lugs that hook it into the screen unit are released. We use a plastic spudger for this.
    2. Take the detached plastic cover out of the device and put it aside.
    Used tools
  8. Disconnecting the battery

    Xiaomi Poco X3 NFC - Disconnecting the battery 01
    Xiaomi Poco X3 NFC - Disconnecting the battery 02
    Used tools
    • Connector

    Always detach the battery connector as soon as possible to avoid a potential short circuit.

    When separating connectors, always start from the side where there are no small components on the motherboard. This way you avoid potential damage.

    1. Carefully pry the battery connector from the motherboard with a plastic spudger.
    Used tools
  9. Disconnecting the fingerprint sensor

    Xiaomi Poco X3 NFC - Disconnecting the fingerprint sensor 01
    Xiaomi Poco X3 NFC - Disconnecting the fingerprint sensor 02
    Used tools
    • Connector

    Now also separate the connector of the orange fingerprint sensor, which is located right next to the battery connector on the motherboard.

    Used tools
  10. Unscrewing the speaker

    • 7 × 3.9 mm Phillips
    1. Remove the sieben Phillips screws from the speaker module.
    2. Then place them on the magnetic pad.
  11. Removing the speaker

    Xiaomi Poco X3 NFC - Removing the speaker 01
    Xiaomi Poco X3 NFC - Removing the speaker 02
    Used tools
    1. Carefully lever the detached speaker out of the screen unit with a spudger.
    2. Then take it out of the device and put it aside.
    Used tools
  12. Disconnecting the connecting cable

    Xiaomi Poco X3 NFC - Disconnecting the connecting cable 01
    Xiaomi Poco X3 NFC - Disconnecting the connecting cable 02
    Xiaomi Poco X3 NFC - Disconnecting the connecting cable 03
    Used tools
    • Connector
    1. Separate the two connectors of the connecting cable from the USB and motherboard each.
    Used tools
  13. Removing the connecting cable

    Xiaomi Poco X3 NFC - Removing the connecting cable 01
    1. Take the separated connecting cable out of your device and put it aside.
    Used tools
  14. Detaching the battery's adhesive tabs

    Xiaomi Poco X3 NFC - Detaching the battery's adhesive tabs 01
    Xiaomi Poco X3 NFC - Detaching the battery's adhesive tabs 02
    Xiaomi Poco X3 NFC - Detaching the battery's adhesive tabs 03
    Xiaomi Poco X3 NFC - Detaching the battery's adhesive tabs 04

    The battery is fixed in the screen unit with a continuous thin adhesive film, on the underside of which are the actual adhesive surfaces. The three tabs of the adhesive film rest on the upper side of the battery.

    1. First, remove the three adhesive tabs from the top of the battery. The labeling of the tabs indicates the order.
  15. The right tools for your repair

    With the right tools, you will succeed in any repair. In our store you will find a large selection of professional quality tools.
    VIEW NOW
  16. Removing the battery

    Xiaomi Poco X3 NFC - Removing the battery 01
    Xiaomi Poco X3 NFC - Removing the battery 02
    Used tools

    If an adhesive tab tears, simply pull the opposite white tab. Otherwise, you can also use a battery spudger to carefully lever the battery out of its guide.

    1. Release the battery by gently pulling the adhesive tab with the A imprint and lift it out of its guide.
    Used tools
  17. Removing the battery's adhesive film

    Xiaomi Poco X3 NFC - Removing the battery's adhesive film 01
    Xiaomi Poco X3 NFC - Removing the battery's adhesive film 02
    Used tools
    Heat gun

    The back of the replacement battery already has an adhesive film, integrated on its back. Therefore you have to remove the old adhesive film from the bottom of the screen unit before you install the new battery.

    To remove the battery's adhesive film from the screen unit without leaving any residue you should first heat it with hot air.

    1. Heat the adhesive film by running a hot air device evenly over it.
    2. Then use a sturdy, flat tool, such as a steel spatula, to drive underneath the adhesive film to remove it piece by piece from the bottom of the screen unit.


    Used tools
  18. Preparing the new battery

    Xiaomi Poco X3 NFC - Preparing the new battery 01
    Xiaomi Poco X3 NFC - Preparing the new battery 02
    Verwendete Ersatzteile

    You may have to bend the connector of the replacement battery to ensure that it can be properly attached. Align it with the help of the connector slot of on the motherboard.

    1. Carefully bend the connector of the replacement battery before installing it.
    2. Then remove the protective foils from the battery's front and back.
    Verwendete Ersatzteile
  19. Inserting the new battery

    Xiaomi Poco X3 NFC - Inserting the new battery 01

    We have reused the old battery for this photo tutorial.

    1. Insert the prepared replacement battery into the screen unit and press it firmly.
  20. Connecting the connecting cable

    The label on the connecting cable will help you to align it.

    Never attach connectors by force. Damage can lead to the failure of an entire component.
    1. Position the connecting cable in the device again.
    2. Attach its two connectors to the main and USB board respectively by gently pressing them down. You should hear and feel them click into place.
    Used tools
  21. Inserting the speaker

    Xiaomi Poco X3 NFC - Inserting the speaker 01
    Xiaomi Poco X3 NFC - Inserting the speaker 02

    There are small lugs on the edge of the speaker module. These must fit into the screen unit to ensure that the speaker sits level.

    1. Put the speaker back in its original position.
  22. Screwing the speaker tight

    • 7 × 3.9 mm Phillips

    Make sure the speaker sits level in the device before you screw it in.

    1. Screw the speaker into place with the seven Phillips screws.
  23. Connecting the fingerprint scanner

    Xiaomi Poco X3 NFC - Connecting the fingerprint scanner 01
    Xiaomi Poco X3 NFC - Connecting the fingerprint scanner 02
    • Connector
    1. Reconnect the fingerprint sensor by carefully pressing it onto the motherboard. You should hear and feel it click into place.
  24. Connecting the battery

    Xiaomi Poco X3 NFC - Connecting the battery 01
    Xiaomi Poco X3 NFC - Connecting the battery 02
    • Connector

    Always connect the battery connector last to avoid a potential short circuit.

    1. You can now also reattach the orange battery connector to the motherboard.
  25. Installing the plastic cover

    Xiaomi Poco X3 NFC - Installing the plastic cover 01
    Xiaomi Poco X3 NFC - Installing the plastic cover 02

    There are a few lugs on the edge of the plastic cover. In order for the cover to sit evenly, all lugs have to fit into the casing's edge. For this, it is best to place the cover on the upper edge of the display unit.

    1. Reinstall the plastic cover over the motherboard.
  26. Screwing the plastic cover tight

    • 11 × 3.9 mm Phillips

    Make sure the plastic cover sits level in the device before you screw it in.

    1. Screw the plastic cover tight with the eleven Phillips screws.
  27. Testing your Xiaomi Poco X3 NFC

    Xiaomi Poco X3 NFC - Testing your Xiaomi Poco X3 NFC 01
    Xiaomi Poco X3 NFC - Testing your Xiaomi Poco X3 NFC 02

    If something doesn't work properly during testing, double-check that everything is installed and attached correctly.

    1. Connect your Poco to the mains in order to check the functionality of the replacement battery.
    2. If available, place it on a wireless charger to check the function of the NFC antenna as well.
    3. To test other components, you can use our checklist as a guide.
  28. Installing a new adhesive frame (optional)

    Xiaomi Poco X3 NFC - Installing a new adhesive frame (optional) 01
    Xiaomi Poco X3 NFC - Installing a new adhesive frame (optional) 02
    Xiaomi Poco X3 NFC - Installing a new adhesive frame (optional) 03
    Xiaomi Poco X3 NFC - Installing a new adhesive frame (optional) 04

    Attaching a new adhesive frame is optional. If it is still in good condition, you do not need to install a new one. However, if it has defects or no longer sticks properly, we recommend that you install a new adhesive frame.

    If the old adhesive frame forms lumps in some places, you should remove them, so that the back cover lies flat again and seals your smartphone properly.

    1. We show you how to apply a new adhesive frame in detail in our YouTube video on the example of the iphone 12.
  29. Attaching the back cover

    Xiaomi Poco X3 NFC - Attaching the back cover 01
    Xiaomi Poco X3 NFC - Attaching the back cover 02
    Used tools
    Heat gun

    We recommend that you run hot air over the edge of the back cover again, so that the glue bonds properly. You can also weigh down your device with books for a few minutes or clamp it like in our example.

    1. Close your Xiaomi Poco X3 NFC after the repair by pressing the back cover back onto the screen unit.
    Used tools
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