The battery of your iPhone 12 mini discharges way to fast? Do you notice a significant drop in performance?

If the one-year manufacturers' warranty has already expired, it is recommended that you replace the battery. In this detailed photo tutorial, we will show you step by step how to do it.

Once you open your device, it is no longer 100 percent dust and waterproof (IP68).

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 backcover, make sure your workspace is clean and level.


After the battery replacement, you will have to connect your iPhone to the power supply to be able to turn it on.

Your iPhone will also display a warning message about the authenticity of the battery. If your phone works normally, you don't need to pay attention to this message though.

We wish you good luck with your repair!

Required tools

  • Hard Plastic Picks

    Hard Plastic Picks

    You need a flat but stable tool such as a 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
  • 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
  • Tweezers

    Tweezers

    We recommend using tweezers to remove screws and various small parts from your device.

    €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
  • Pentalobe PL1 screwdriver

    Pentalobe PL1 screwdriver

    You need the right screwdriver for removing pentalobe PL1 screws.

    €11.00 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
  • Phillips screwdriver with centering pin

    Phillips screwdriver with centering pin

    Phillips screwdriver with practical centering pin for logic board screws.

    €11.00 at the iDoc store
  • Y-type Y000 screwdriver

    Y-type Y000 screwdriver

    You need the right screwdriver for removing Y-type screws.

    €11.00 at the iDoc store
Show all replacement parts for the iPhone 12 mini 

Passendes Werkzeug

Mit unserem Werkzeug gelingt dir die Reparatur.

for €59.00

Getting started with the repair of your iPhone 12 mini

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

37 steps
  1. Switching off your iPhone 12 mini

    iPhone 12 mini - Switching off your iPhone 12 mini 01
    iPhone 12 mini - Switching off your iPhone 12 mini 02
    iPhone 12 mini - Switching off your iPhone 12 mini 03

    Before starting your repair, we recommend that you use our checklist to test the basic functions of your iPhone 12 mini. This way you can check afterwards if your repair was successful.

    1. To switch off your iPhone, press and hold the side and volume down button simultaneously for a few seconds.
    2. Your phone will shut down completely within a few seconds after swiping the displayed slider from left to right.
  2. Removing the Pentalobe screws

    • 2 × 6.7 mm Pentalobe

    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 two Pentalobe screws with a Pentalobe screwdriver.
    2. Then put them on your magnetic pad.
  3. Heating up the screen

    iPhone 12 mini - Heating up the screen 01
    iPhone 12 mini - Heating up the screen 02
    Used tools
    Heat gun

    The display edge is heavily glued. It is therefore essential to first heat it up sufficiently. Use a hot air device, 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 display only to the point where you can still touch it.
    1. Heat the edge of the display by running the hot air device evenly over it.
    Used tools
  4. Lifting up the screen

    To create a narrow gap between the display's edge and the case, 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 display edge and pull it upwards. At the same time, insert the iFlex between the edge of the display and the case.
    2. Insert a flat pick into a spot that has already been loosened so that the glue does not bond again.
    Used tools
  5. Detaching the screen

    To avoid damaging the edge of the case with the sharp edges of the iFlex when detaching the display, you should switch to a plastic tool as soon as possible. We recommend the hard plastic pick for this.

    1. Run the hard plastic pick all the way around the display edge. At the same time, push it upwards to loosen the display's hooked lugs from the casing's frame.
  6. Unfolding the screen

    iPhone 12 mini - Unfolding the screen  01
    iPhone 12 mini - Unfolding the screen  02
    iPhone 12 mini - Unfolding the screen  03

    Never unfold the screen more than 180° while the sensitive screen cables are still connected. Otherwise, they could tear.

    1. Once the display is completely detached, you first have to remove all plastic picks.
    2. Then carefully open it towards the volume buttons. Lean it against a stable object to avoid overstretching the flex cables.
  7. Unscrewing the cover plates

    • 1 × 1.0 mm Y-Type
    • 5 × 1.2 mm Y-Type
    1. Remove the six Y-type screws from the two cover plates using a Y-type screwdriver.
    2. Then place them on the magnetic pad.
  8. Removing the cover plates

    iPhone 12 mini - Removing the cover plates 01
    iPhone 12 mini - Removing the cover plates 02
    iPhone 12 mini - Removing the cover plates 03
    1. Remove the two cover plates from your device with a pair of tweezers.
    2. Then put them with the appropriate screws on your magnetic pad.
    Used tools
  9. Detaching the battery connector

    iPhone 12 mini - Detaching the battery connector 01
    iPhone 12 mini - Detaching the battery connector 02
    iPhone 12 mini - Detaching the battery connector 03
    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 logicboard. This way you avoid potential damage.

    1. Use a plastic lever tool to carefully slide under the battery connector and separate it from the board. We use a plastic spudger for this.
    Used tools
  10. Detaching the screen connectors

    iPhone 12 mini - Detaching the screen connectors 01
    iPhone 12 mini - Detaching the screen connectors 02
    iPhone 12 mini - Detaching the screen connectors 03
    iPhone 12 mini - Detaching the screen connectors 04
    Used tools
    • Connector

    The iPhone 12 mini has two display connectors. One of them connects the earpiece to the logicboard.

    1. Run the spudger underneath the two display connectors one after the other and carefully pry them off the logicboard.
    Used tools
  11. Removing the screen

    iPhone 12 mini - Removing the screen 01
    iPhone 12 mini - Removing the screen 02
    1. Once the display is completely detached, you can remove it and put it aside.
  12. Unscrewing the speaker

    • 4 × 1.6 mm Phillips
    1. Loosen the four Phillips screws of the speaker modul with a Phillips screwdriver and take them out of your device.
  13. Removing the speaker

    iPhone 12 mini - Removing the speaker 01
    iPhone 12 mini - Removing the speaker 02
    1. Take the loosened speaker out of your device with the help of tweezers.
    2. Put it next to the screws on the magnetic pad.
    Used tools
  14. Unscrewing the cover plate

    • 1 × 1.3 mm Phillips
    • 1 × 2.0 mm Phillips
    1. Remove the two Phillips screws from the cover plate. It protects and fixes the connector of the Taptic Engine.
    2. Then put them out of the device.
  15. Removing the cover plate

    1. Take the Taptic Engine's cover plate out of your device with the help of tweezers.
    2. Place it with the appropriate screws on your magnetic pad.
  16. Detaching the Taptic Engine connector

    iPhone 12 mini - Detaching the Taptic Engine connector 01
    iPhone 12 mini - Detaching the Taptic Engine connector 02
    iPhone 12 mini - Detaching the Taptic Engine connector 03
    Used tools
    • Connector

    The connector of the Taptic Engine is attached to the cable set of the Lightning connector.

    1. Run the spudger under the connector of the Taptic Engine and carefully lever it off the logicboard.
    Used tools
  17. Unscrewing the Taptic Engine

    • 1 × 1.6 mm Y-Type
    • 1 × 3.0 mm Standoff
    1. Now loosen the two screws that hold the Taptic Engine in the case.
    2. Then take them out.
  18. Removing the Taptic Engine

    iPhone 12 mini - Removing the Taptic Engine 01
    iPhone 12 mini - Removing the Taptic Engine 02
    Used tools
    1. Take the detached Taptic Engine out of your iPhone.
    2. Place it on the magnetic pad with the corresponding screws.
    Used tools
  19. 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
  20. Pulling out the battery's adhesive strips

    iPhone 12 mini - Pulling out the battery's adhesive strips 01
    iPhone 12 mini - Pulling out the battery's adhesive strips 02
    iPhone 12 mini - Pulling out the battery's adhesive strips 03

    The battery of the iPhone 12 mini is attached to the case unit with 4 adhesive strips. These can be pulled out by their tabs, which are each attached to the top of the battery.The tabs of the adhesive battery strips lie very flat on the battery. Therefore, look closely to avoid confusing them with another protective film of the battery.

    1. Use tweezers to carefully detach the black tabs of the adhesive strips from the edge of the battery.
    2. Then pull them out from under the battery as flat as possible so that they do not tear.


    Used tools
  21. Removing the battery

    If one of the adhesive strips is torn, you have to pry the battery out very carefully, as it can easily be bent. If you use a tool like the battery spudger, you should only apply it to the short sides of the battery to avoid damaging the flex cable and the NFC antenna underneath.

    1. Remove the battery from your device and put it aside.
    2. You should carefully remove the remains of the adhesive strips on the case's bottom with tweezers.



  22. Inserting the battery

    iPhone 12 mini - Inserting the battery 01
    iPhone 12 mini - Inserting the battery 02
    iPhone 12 mini - Inserting the battery 03

    After you have removed the protective films from your replacement battery, you can insert it at this point.

    1. Align the battery in the case at its connector.
    2. Then press it firmly into the case.
    Verwendete Ersatzteile
  23. Inserting the Taptic Engine

    iPhone 12 mini - Inserting the Taptic Engine 01
    iPhone 12 mini - Inserting the Taptic Engine 02
    1. Carefully place the Taptic Engine back in its original position using tweezers.
    Used tools
  24. Screwing the Taptic Engine tight

    • 1 × 1.6 mm Y-Type
    • 1 × 3.0 mm Standoff

    Be careful not to mix up the screws, Using a screw that is too long can potentially damage the case unit.

    1. Screw the Taptic Engine with one Y-type and one standoff screw each.
  25. Attaching the Taptic Engine connector

    iPhone 12 mini - Attaching the Taptic Engine connector 01
    iPhone 12 mini - Attaching the Taptic Engine connector 02
    iPhone 12 mini - Attaching the Taptic Engine connector 03
    • Connector

    Never attach connectors by force. Damage to a connector can lead to the failure of an entire component.

    1. Attach your connector by gently pressing it onto its slot on the Lightning connector cable set. You should hear and feel it click into place.
  26. Aligning the cover plate

    iPhone 12 mini - Aligning the cover plate 01
    iPhone 12 mini - Aligning the cover plate 02
    1. Reposition the cover plate of the Taptic Engine over its connector.
    Used tools
  27. Screwing the cover plate tight

    • 1 × 1.3 mm Phillips
    • 1 × 2.0 mm Phillips

    To prevent the cover plate from moving when screwing, you can secure it with tweezers.

    1. Attach the cover plate of the Taptic Engine with the two Phillips screws.
  28. Inserting the speaker

    iPhone 12 mini - Inserting the speaker 01
    iPhone 12 mini - Inserting the speaker 02
    1. Put the speaker back into the case unit.
  29. Screwing the speaker tight

    • 4 × 1.6 mm Phillips
    1. Screw the speaker with the four Phillips-screws.
  30. Installing a new adhesive frame (optional)

    iPhone 12 mini - Installing a new adhesive frame (optional) 01
    iPhone 12 mini - Installing a new adhesive frame (optional) 02
    iPhone 12 mini - Installing a new adhesive frame (optional) 03
    iPhone 12 mini - Installing a new adhesive frame (optional) 04
    iPhone 12 mini - Installing a new adhesive frame (optional) 05
    Used tools

    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.

    1. We show you how to apply a new adhesive frame in detail in our YouTube video.
    Used tools
    Verwendete Ersatzteile
  31. Putting on the screen

    iPhone 12 mini - Putting on the screen 01
    iPhone 12 mini - Putting on the screen 02
    1. Put the display back on the casing unit. For this, lean it against a stable object.
  32. Attaching the screen connectors

    iPhone 12 mini - Attaching the screen connectors 01
    iPhone 12 mini - Attaching the screen connectors 02
    iPhone 12 mini - Attaching the screen connectors 03
    iPhone 12 mini - Attaching the screen connectors 04
    • Connector
    1. Attach the display connectors by carefully pressing them onto the board one after the other. They should click into place audibly and perceptibly.
  33. Attaching the battery connector

    iPhone 12 mini - Attaching the battery connector 01
    iPhone 12 mini - Attaching the battery connector 02
    iPhone 12 mini - Attaching the battery connector 03
    • Connector

    Always connect the battery connector as late as possible to avoid a potential short circuit.

    1. Attach the battery connector by carefully pressing it onto the logicboard. You should hear and feel it click into place.

  34. Testing your iPhone 12 Mini

    iPhone 12 mini - Testing your iPhone 12 Mini  01
    iPhone 12 mini - Testing your iPhone 12 Mini  02
    iPhone 12 mini - Testing your iPhone 12 Mini  03

    Flip the display over to test your iPhone 12 mini after the repair. However, do not press it firmly into the case unit yet. This way, you can quickly open it again if necessary.

    If something doesn't work properly during testing, double-check that everything is installed and attached correctly.
    1. Connect a charging cable to check the functionality of the replacement battery. If your iPhone is charging, everything is fine.
    2. Afterwards, you can check the functionality of other components. Again, you can use our checklist as a guide.
  35. Aligning the cover plates

    1. Flip the display back open after the test run.
    2. Place the two cover plates over the battery and display connectors. Use the screw holes as a reference.
    Used tools
  36. Screwing the cover plates tight

    • 1 × 1.0 mm Y-Type
    • 5 × 1.2 mm Y-Type
    1. Then screw the two plates back onto the logicboard using the Y-type screws.
  37. Inserting the display

    iPhone 12 mini - Inserting the display 01
    iPhone 12 mini - Inserting the display 02
    iPhone 12 mini - Inserting the display 03

    To ensure that the display bonds properly with the case unit again after insertion, you should heat the edge of the display with hot air. Afterwards, you can weigh down your iPhone with a few books for about half an hour or clamp it down.

    1. Carefully flip the display over and press it firmly into the case unit.
  38. Fastening the Pentalobe screws

    • 2 × 6.7 mm Pentalobe

    At the end of the repair, fix the display in the case unit by fastening the Pentalobe screws.

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iDoc schenkt dir den ultimativen Reparatur-Guide GUIDE GRATIS ANFORDERN