Galaxy S9+ battery replacement guide

The battery life is low. Your Galaxy S9+ keeps crashing or won’t charge.

  • Galaxy S9+
  • 13 Steps
  • Difficult
  • 60 min.
Go to the guide

Introduction

With this detailed step-by-step guide, you can easily replace your Galaxy S9+ battery at home.

The repair is a bit difficult as the Galaxy S9+ has to be opened via the glass back cover. Unfortunately, this is a rather cumbersome procedure, so plan enough time for it.

Do a backup before the repair, use a clean work surface and reserve enough time. If you are stuck at any point, just contact our live chat or write a comment on the corresponding step.

Required tools

  • Flache Plektren

    Flache Plektren

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

    €1.00 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 €14.99 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

    Die kleinen Teile in deinem Smartphone auseinanderzukriegen kann eine sehr große Arbeit bedeuten. Die Klinge des kompakten aber stabilen iFlex hat eine Dicke von nur 0,15 mm, sodass es auch in den kleinsten Spalten reinpasst, beispielsweise zwischen dem Display und dem Rahmen oder unter dem Logicboard. Das praktische iFlex ist aus hochwertigem rostfreiem Stahl und liegt gut in der Hand. Damit ist es der perfekte Helfer bei jeder Smartphone-Reparatur.

    €9.00 at the iDoc store
  • Tweezers

    Tweezers

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

    €16.00 at the iDoc store
  • Phillips PH00 screwdriver

    Phillips PH00 screwdriver

    You need the right screwdriver for removing PH00 screws.

    €10.00 at the iDoc store

Required replacement part

  • Samsung Galaxy S9+ Akku

    Samsung Galaxy S9+ Akku

    Verhilf deinem Galaxy S9 Plus mit einer neuen Batterie wieder zu langer Laufzeit. Der Akku wird zusammen mit dem benötigten Klebestreifen geliefert. Es handelt sich um ein Original-Ersatzteil direkt vom Hersteller. Ein neuer Akku kann auch bei folgenden Problemen helfen: Wenn dein Smartphone bei hoher Belastung abstürzt, da die Spannung temporär abfällt oder es sich bei Kälte einfach ausschaltet. Wenn es sich nicht mehr einschalten oder laden lässt oder wenn die Akku-Laufzeit sehr gering ist.

    €29.00 at the iDoc store
Show all replacement parts for the Galaxy S9+ 

Replacement parts and tools for this repair

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

Samsung Galaxy S9+ Akku

Verhilf deinem Galaxy S9 Plus mit einer neuen Batterie wieder zu langer Laufzeit. Der Akku wird zusammen mit dem benötigten...

Werkzeugset Samsung

Ganz gleich, welches Problem dein Handy hat - mit unserem Werkzeugset kannst du es bestimmt beheben. Dieses Reparaturset umfasst jeweils einen...

together for €78.00

Getting started

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

13 steps
  1. Switching off your device

    Galaxy S9+ - Switching off your device 01
    Galaxy S9+ - Switching off your device 02
    1. Turn off your device by holding down the power button until the “Power off” option appears.
    2. Use your finger to confirm that you want to shut down your Galaxy S9+ and wait until the screen goes blank.
  2. Removing the back cover

    Galaxy S9+ - Removing the back cover 01
    Galaxy S9+ - Removing the back cover 02
    Galaxy S9+ - Removing the back cover 03
    Galaxy S9+ - Removing the back cover 04
    Galaxy S9+ - Removing the back cover 05
    1. The back cover’s really glued to the chassis. Heat the device evenly with hot air to soften the glue. A temperature of 60 - 80°C should be sufficient. As a rule of thumb, you should still be able to touch your device without it being uncomfortably hot.
    2. The easiest way to loosen the back cover is to use a flat and flexible tool such as the iPlastix or iFlex. You will also need several picks to unstick the back cover all around.
    1. Heat the spot where you start and place a flat tool between the back cover and the frame.

    The iPlastix is made of plastic, so it won't scratch the device. On the other hand, it's very soft and tricky to insert.

    Be extra careful, the back cover can break very easily. If necessary, apply the heat several times and try again. Removing the back cover might take half an hour. Take a little more time and work carefully to make sure you don't break anything.

    1. Once the tool is inserted, stick a pick into the gap to keep it open. Then run the tool around the entire edge to gradually loosen the glue.
    2. Then heat the next part and insert the picks one by one.

    The back cover glue is extra strong on the lower edge.

    1. Once the back cover is loosened, lift it very slightly. The fingerprint sensor underneath the camera is still connected with a cable.

    Use a suction cup to lift the glass if you can’t find anywhere to insert the tool

  3. Disconnecting the fingerprint sensor

    Galaxy S9+ - Disconnecting the fingerprint sensor 01
    Galaxy S9+ - Disconnecting the fingerprint sensor 02
    1. After detaching the back cover, carefully lift it and disconnect the fingerprint sensor using the spudger.
    2. Then you can completely remove the back cover and set it aside.
  4. Removing the NFC antenna

    Galaxy S9+ - Removing the NFC antenna 01
    Galaxy S9+ - Removing the NFC antenna 02
    Galaxy S9+ - Removing the NFC antenna 03
    • 11 × 3,87 mm Phillips
    1. Remove the screws that attach the upper cover to the display.
    2. The cover is latched onto the case, the lower part of the antenna is lightly glued in place. Slide a flat tool under the latches to disconnect them.
    3. Now remove the antenna.
  5. Disconnecting the battery contact

    Galaxy S9+ - Disconnecting the battery contact 01
    Galaxy S9+ - Disconnecting the battery contact 02
    • Battery connector
    1. Using the spudger, carefully disconnect the battery contact from the motherboard.
  6. Removing the battery

    Galaxy S9+ - Removing the battery 01
    Galaxy S9+ - Removing the battery 02
    Galaxy S9+ - Removing the battery 03

    The battery glue is very strong, so you should use hot air again.

    Never heat the battery directly and don't bend it.

    The battery is glued around the outer edges but not at the center.

    1. Apply the hot air from the display side.
    2. We recommend running a flat tool, such as the iFlex, all around the battery.
    3. Now take out the battery.
    Be careful not to damage the battery. Take your time and heat the glue several times.
  7. Preparing the new battery

    Galaxy S9+ - Preparing the new battery 01
    Galaxy S9+ - Preparing the new battery 02
    1. Transfer the black sticker from the old battery to the new one. You can remove it carefully with a pair of tweezers.
    2. Remove the protective film on the back of the new battery.
  8. Inserting the battery

    Galaxy S9+ - Inserting the battery 01
    Galaxy S9+ - Inserting the battery 02
    1. Put the battery in the enclosure. It fits perfectly into the compartment in the middle of the enclosure.
    2. Press the battery firmly into the enclosure so the glue will stick better.
  9. Connecting the battery

    Galaxy S9+ - Connecting the battery 01
    Galaxy S9+ - Connecting the battery 02
    • Battery connector
    1. Connect the battery to the motherboard. Press the contact onto the connection on the motherboard until you hear it click into place.
  10. Installing the NFC antenna

    Galaxy S9+ - Installing the NFC antenna 01
    Galaxy S9+ - Installing the NFC antenna 02
    • 11 × 3,87 mm Phillips
    1. Put the cover with the antenna back in the enclosure after hooking it onto the top of the enclosure.
    2. Then press the cover with your fingers until it clicks gently into place all over.
    3. Fasten the phillips screws.
  11. Connect fingerprint sensor

    Galaxy S9+ - Connect fingerprint sensor 01
    Galaxy S9+ - Connect fingerprint sensor 02
    Galaxy S9+ - Connect fingerprint sensor 03
    1. Before attaching the back cover, plug in the fingerprint sensor connector.
    2. Use a plastic tool to reach the connector.
  12. Preparing the backcover

    Galaxy S9+ - Preparing the backcover 01
    Galaxy S9+ - Preparing the backcover 02

    Before you put the back cover back on the case, inspect the adhesive. It should sit evenly on the edge so that the back cover can be placed flush. Remove excess glue if necessary.

  13. Attaching the back cover

    Galaxy S9+ - Attaching the back cover 01
    1. Put the back cover back in its original position.
    2. Press the back cover on all over so the glue will stick.

    You can also heat your device with hot air and then clamp it or weight it down with a couple books so the glue will stick better.

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