Galaxy S20 - Battery replacement

  • Galaxy S20
  • 15 Steps
  • Medium
  • 60 min.
Go to the guide

The battery does not last long or does not charge properly.

With these repair instructions you can replace the battery of your Samsung Galaxy S20 and give your faithful companion new life! We at iDoc Europe will guide you step by step through the repair process.

The Samsung Galaxy S20 is opened by removing the heavily glued glass back cover. Before removing the defective battery, some components have to be removed. The battery itself is also glued quite strongly inside the device. But with hot air and the right tools, this is also no problem.

If questions arise during your repair, you can always contact our iDoc technicians. Don't hesitate to contact us using either the chat or comment function. We also welcome feedback!


Required tools

  • Tool for prying out batteries

    Tool for prying out batteries

    You have to use a very stable tool to pry out the battery. At the same time, it has to be flat enough to insert below the battery.

    €2.00 at the iDoc store
  • Flat Picks

    Flat Picks

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

    €2.00 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.

    €10.00 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.

    €10.00 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.

    €10.00 at the iDoc store
  • iSesamo

    iSesamo

    If you want to remove the glued screen from your smartphone, you will need a narrow tool to separate the glue. With a solid but flat metal tip and a non-slip grip, the iSesamo is an effective support for the work with a plectrum.

    €10.00 at the iDoc store
  • Tweezers

    Tweezers

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

    €10.00 at the iDoc store
  • Plastic prying tool

    Plastic prying tool

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

    €2.00 at the iDoc store
  • Suction cup

    Suction cup

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

    €2.00 at the iDoc store
  • Phillips PH00 screwdriver

    Phillips PH00 screwdriver

    You need the right screwdriver for removing PH00 screws.

    €13.00 at the iDoc store

Required replacement part

Show all replacement parts for the Galaxy S20 

Replacement parts and tools for this repair

Our tools plus the right spare part help you fix your device easily.

Getting started with the repair of your Galaxy S20

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

15 steps
  1. Switching off the device

    Galaxy S20 - Switching off the device 01
    Galaxy S20 - Switching off the device 02
    Galaxy S20 - Switching off the device 03
    1. Switch off the device at the beginning to avoid short circuits during the repair.

    If the screen can no longer be used due to damage, the device is switched off by disconnecting the battery.




  2. Removing the back cover

    Galaxy S20 - Removing the back cover 01
    Galaxy S20 - Removing the back cover 02
    Galaxy S20 - Removing the back cover 03
    Galaxy S20 - Removing the back cover 04
    Galaxy S20 - Removing the back cover 05
    Galaxy S20 - Removing the back cover 06
    Galaxy S20 - Removing the back cover 07
    Galaxy S20 - Removing the back cover 08
    Galaxy S20 - Removing the back cover 09
    Used tools

    The Samsung Galaxy S20 is opened via the heavily bonded glass back cover.

    1. Heat the frame of the device with hot air to about 60-80 degrees. Heating it makes the backcover's adhesive easier to remove.
    2. Take a suction cup and place it on the bottom of the device.
    3. Pull the suction cup and guide your flat opening tool into the resulting gap.

    The iFlex opening tool, which is made of thin, strong metal, is very suitable for removing such glued back covers. Once inserted, we recommend using a plastic tool, as this will not scratch the frame and back cover.You can also use an iSclack instead of a suction cup. This tool works like a pair of pliers with suction cups on both sides.

    1. Insert a narrow plectrum into the already loosened part so that the glue does not reattach.
    2. Guide your tool along the entire edge of the back cover.
    Warm up the tool from time to time and work carefully to avoid breaking the glass. This step takes some time.
    1. In the area of the camera you should also take care not to insert your tool too far into the device.
    Please note: Once the device has been opened for the first time, a hundred percent protection against the ingress of dust and liquids can no longer be guaranteed.
    Used tools
  3. Removing the charging coil

    • 5 × 4,0 mm Phillips
    1. Remove the Phillips screws of equal length from the charging coil.

    An iDoc magnetic pad can help you sort screws and smaller components.

    1. The coil is slightly glued to the speaker. Loosen the glue and remove the cover. It is slightly hooked at the top end.
  4. Disconnecting the battery

    Galaxy S20 - Disconnecting the battery 01
    Galaxy S20 - Disconnecting the battery 02
    Galaxy S20 - Disconnecting the battery 03
    Galaxy S20 - Disconnecting the battery 04
    Used tools
    • Battery Connector
    1. Now disconnect the battery with a plastic spudger.

    Pay attention to the small components next to the battery connector. Lever from the other side to avoid accidentally damaging them.


    Used tools
  5. Removing the speaker

    Galaxy S20 - Removing the speaker 01
    Galaxy S20 - Removing the speaker 02
    Galaxy S20 - Removing the speaker 03
    Galaxy S20 - Removing the speaker 04
    Galaxy S20 - Removing the speaker 05
    • 5 × 4,0 mm Phillips
    1. Loosen the Phillips screws that secure the speaker in the unit.
    2. Then lift up the speaker and take it out.
  6. Removing the flex cables

    Galaxy S20 - Removing the flex cables 01
    Galaxy S20 - Removing the flex cables 02
    Galaxy S20 - Removing the flex cables 03
    Galaxy S20 - Removing the flex cables 04
    Galaxy S20 - Removing the flex cables 05
    Galaxy S20 - Removing the flex cables 06
    Galaxy S20 - Removing the flex cables 07
    • Connector
    1. Loosen and remove the flex cables that run over the battery.
    2. Separate the connectors carefully with the spudger and take out the two upper cables.
    3. Then disconnect the display cable from the motherboard.
  7. Removing the battery

    Galaxy S20 - Removing the battery 01
    Galaxy S20 - Removing the battery 02
    Galaxy S20 - Removing the battery 03
    Galaxy S20 - Removing the battery 04
    Galaxy S20 - Removing the battery 05
    Galaxy S20 - Removing the battery 06
    Galaxy S20 - Removing the battery 07
    Galaxy S20 - Removing the battery 08
    Used tools
    1. The battery is strongly glued. You should use hot air again to loosen the glue more easily.

    Never heat the battery directly, but from underneath via the screen.

    1. Fold the display flex cable that runs above the battery to the side. If necessary you can fix it to prevent it from getting in the way while removing the battery.
    2. Use a tool such as the iSesamo or a battery supdger to lever.
    3. Lever with the tool around the battery to release it bit by bit.
    4. Do not bend the battery and take care not to pinch the battery or damage its cover.
    5. Once the glue is slightly loosened, you can use a flat plastic tool such as the iPlastix to slide beneath the battery.
    6. Take enough time for this step and warm up the glue in between.
    7. Once the adhesive is loosened, you can remove the battery from the device.


    Used tools
  8. 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
  9. Preparing the battery

    Galaxy S20 - Preparing the battery 01
    Galaxy S20 - Preparing the battery 02
    Galaxy S20 - Preparing the battery 03
    Galaxy S20 - Preparing the battery 04
    Verwendete Ersatzteile
    1. Remove any adhesive residue remaining in the unit. This will prevent your new battery from sitting improperly inside the device and being pushed up by adhesive residue.
    2. Then remove all protective films from the adhesive surfaces of your new battery.
    3. If there is no adhesive surface on your new battery, you can use very thin double-sided adhesive tape or our universal adhesive strips.
    Verwendete Ersatzteile
  10. Inserting the battery

    Galaxy S20 - Inserting the battery 01
    Galaxy S20 - Inserting the battery 02
    Galaxy S20 - Inserting the battery 03
    1. Then insert the battery into the device. Make sure that it has a little space on all sides and is not pushed against the frame anywhere.
  11. Installing the flex cables

    Galaxy S20 - Installing the flex cables 01
    Galaxy S20 - Installing the flex cables 02
    Galaxy S20 - Installing the flex cables 03
    Galaxy S20 - Installing the flex cables 04
    Galaxy S20 - Installing the flex cables 05
    Galaxy S20 - Installing the flex cables 06
    Galaxy S20 - Installing the flex cables 07
    • Connector
    1. Reinsert the flex cables that run above the battery.
    2. The side labeled "MAIN" should face up inside the unit.
    3. Connect the connectors to the main board and the USB board.
  12. Inserting the speaker

    Galaxy S20 - Inserting the speaker 01
    Galaxy S20 - Inserting the speaker 02
    Galaxy S20 - Inserting the speaker 03
    Galaxy S20 - Inserting the speaker 04
    • 5 × 4,0 mm Phillips
    1. Insert the speaker, press it down and screw it in place. Make sure it's hooked in at the bottom.
  13. Connecting the battery

    Galaxy S20 - Connecting the battery 01
    Galaxy S20 - Connecting the battery 02
    Galaxy S20 - Connecting the battery 03
    • Battery Connector
    1. Position the battery contact over its socket on the mainboard and press it down.
  14. Installing the charging coil

    Galaxy S20 - Installing the charging coil 01
    Galaxy S20 - Installing the charging coil 02
    Galaxy S20 - Installing the charging coil 03
    Galaxy S20 - Installing the charging coil 04
    • 5 × 4,0 mm Phillips
    1. Put on the metal cover with the charging coil.
    2. Hook it in at the top and fasten all screws.
  15. Testing the Galaxy S20

    Galaxy S20 - Testing the Galaxy S20 01
    Galaxy S20 - Testing the Galaxy S20 02
    Galaxy S20 - Testing the Galaxy S20 03
    Galaxy S20 - Testing the Galaxy S20 04
    Galaxy S20 - Testing the Galaxy S20 05
    1. Test your Galaxy S20 before you finally close the device.
    2. Switch on the device and open the telefone app.
    3. Here you enter *#0*# and a test menu opens.
    4. In the test menu you can test the display for pixel errors and check the touchscreen and other functions such as the camera, the speaker or the status LED.
    5. If everything is OK, you can lock your smartphone for good.
  16. Attaching the back cover

    Galaxy S20 - Attaching the back cover 01
    Galaxy S20 - Attaching the back cover 02
    Galaxy S20 - Attaching the back cover 03
    Galaxy S20 - Attaching the back cover 04
    Galaxy S20 - Attaching the back cover 05
    Galaxy S20 - Attaching the back cover 06
    Galaxy S20 - Attaching the back cover 07
    Galaxy S20 - Attaching the back cover 08
    Verwendete Ersatzteile
    1. Before you put the backcover back on you should check the glue. It should be evenly distributed on the edge of the backcover. Remove excess glue if necessary.
    2. If you like, you can also remove the old glue and use a new one.
    Please note, that even with a new adhesive frame a 100% protection against the ingress of dust and liquids can no longer be guaranteed.
    1. Before attaching a new adhesive frame, you must first remove all old adhesive residues on the backcover and frame. You can use a plastic supdger to scrape off some of the glue. Cleaning alcohol and a lint-free cloth can help to remove the residue.
    2. Check the alignment of the frame, then peel off the first protective film and apply the adhesive to the frame. Don't press it down yet, but check that it is properly seated on all sides. The adhesive should not protrude at anywhere.
    3. Press the adhesive down all around so that it bonds properly to the frame.
    4. Loosen the second foil. Make sure that the adhesive does not come off the frame.
    5. Position the backcover over the device and put it down slowly.
    6. Heat the backcover again with hot air so that the adhesive bonds again.
    7. As long as the glue cools down, you can press the backcover down with your fingers or weight it down with a few books.
    Verwendete Ersatzteile
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