The battery life is low. Your Galaxy S3 keeps crashing or won’t charge.

In this repair guide, we show you how to replace your Samsung Galaxy S3’s defective battery on your own. This repair can help if your Samsung Galaxy S3 crashes during heavy use because the voltage temporarily drops, you can no longer turn it on, or the battery life is very low.

Required tools

  • Menda ESD Spudger

    Menda ESD Spudger

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

    from €26.38 on Amazon

Required replacement part

Show all replacement parts for the Galaxy S3 

Getting started with the repair of your Galaxy S3

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

5 steps
  1. Removing the back cover

    Galaxy S3 - Removing the back cover 01
    Galaxy S3 - Removing the back cover 02
    1. Insert the spudger into the gap next to the headphones. Carefully lift the back cover. There are 16 clips on the outside under the back cover. You have to disconnect them by moving the spudger around the entire smartphone one time. Alternatively, you can detach the back cover using your fingernails.
    2. Then you can take off the back cover.
  2. Removing the battery

    Galaxy S3 - Removing the battery 01
    Galaxy S3 - Removing the battery 02
    1. If your Samsung Galaxy’s still on, turn it off now by holding down the standby button for about three seconds and following the prompt on the display.
    2. Now use the spudger or your fingertip to lift the battery (see figure 1) and then remove it (see figure 2).
  3. 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.
  4. Installing the battery

    Galaxy S3 - Installing the battery 01
    1. Put the battery back in. The +/- symbols have to be touching the contact point.
  5. Attaching the back cover

    Galaxy S3 - Attaching the back cover 01
    1. It’s very easy to put the back cover back on. Put it on in the correct position and press it on all the way around the phone until all the clips have clicked into place.
  6. Final test

    1. Start your Samsung Galaxy S4 and enter the following key combination:
    2. Then press the call button.
    3. Now you can check all the functions.
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