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

In this guide, we show you how to replace your iPhone 4’s defective battery. This repair can help if your iPhone crashes during heavy use because the voltage temporarily drops, you can no longer charge it or turn it on, or the battery life is very low.

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.

    from €10.99 on Amazon
  • 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 €15.99 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.

    from €10.99 on Amazon
  • 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
  • Pentalobe PL1 screwdriver

    Pentalobe PL1 screwdriver

    You need the right screwdriver for removing pentalobe PL1 screws.

    on Amazon
  • Phillips PH00 screwdriver

    Phillips PH00 screwdriver

    You need the right screwdriver for removing PH00 screws.

    from €10.84 on Amazon

Required replacement part

Show all replacement parts for the iPhone 4 

Getting started with the repair of your iPhone 4

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

8 steps
  1. Removing the enclosure screws

    iPhone 4 - Removing the enclosure screws 01
    1. Depending on when your iPhone was manufactured, you’ll need either a Phillips screwdriver or a pentalobe screwdriver to open your phone.
    2. Depending on when your iPhone was manufactured, you’ll need either a Phillips screwdriver or a pentalobe screwdriver to open your phone. They are located to the right and left of the dock connector. Put the screws in the same compartment of your organizer tray.
      2 x 3.6 mm pentalobe/Phillips screws
  2. Removing the back cover

    iPhone 4 - Removing the back cover 01
    iPhone 4 - Removing the back cover 02
    1. Use your thumbs or the palm of your hand to push the back cover of your iPhone about 4 mm away from the bottom of the phone where the dock connector is (see figure 1).
    2. Then you can lift the back cover at the end that’s sticking out past the phone (see figure 2).
  3. Disconnecting the battery connector

    iPhone 4 - Disconnecting the battery connector 01
    iPhone 4 - Disconnecting the battery connector 02
    1. If your iPhone’s still on, turn it off now by holding down the standby button for about five seconds and following the prompt on the display.
    2. Remove the screw on the battery connector using a Phillips screwdriver (see figure 1). Put the screw in a separate compartment of your organizer tray.
      1 x 2.6 mm Phillips screw
      The battery contact point on the logic board could come off. If the contact point breaks off but the soldering points are still intact, you can solder the contact point back on.
    3. Now carefully lift off the battery connector by inserting the pointed ESD spudger slightly below the silver cover plate (see figure 2). If you don’t have a spudger, you can also try using your fingernail.
    4. For the rest of the repair, you can also use the metal laboratory spatula instead of the spudger. This may make some steps easier for you. However, we explicitly recommend using the ESD spudger produced specifically for precision electronics.
  4. Removing the battery

    iPhone 4 - Removing the battery 01
    iPhone 4 - Removing the battery 02
    iPhone 4 - Removing the battery 03
    1. The antenna cover is under the battery connector. NRemove the cover and put it in the same compartment of your organizer tray as the Phillips screw you removed before. (See figure 1).
    2. Now remove the battery. It’s sometimes glued firmly in place. Insert the flat end of the spudger into the space (about 1 cm to the left of the volume down button) between the battery and the outer frame, and slowly lift the battery (see figure 2). If the battery’s really stuck on, use other leverage points to the right and left of the original spot to pry it off. If you still can’t detach the battery, you can use a heat gun to warm it slightly from the outside and soften the glue.
    3. Now you can also disconnect the antenna connector by carefully pulling it off the plug head using the spudger (see figure 3).
  5. 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
  6. Installing the battery

    iPhone 4 - Installing the battery 01
    iPhone 4 - Installing the battery 02
    1. Now put the battery back in the iPhone.
    2. Then install the antenna cover (see figure 1).
    3. Now click the battery connector back into place and screw it in (see figure 2).
      1 x 2.6 mm Phillips screw
  7. Attaching the back cover

    iPhone 4 - Attaching the back cover 01
    1. Put the back cover back on and carefully push it the last few millimeters toward the dock connector.
  8. Fastening the enclosure screws

    iPhone 4 - Fastening the enclosure screws 01
    1. Now screw in the two screws at the bottom of the enclosure.
      2 x 3.6 mm pentalobe/Phillips screws
    2. Then all you have to do is push in the SIM card tray.
  9. Setting the time

    iPhone 4 - Setting the time 01

    When the battery is removed from the device, the iPhone loses the time and sets itself to 1:00 a.m. on 1/1/1970. You could have trouble connecting to the cellular network if the time isn’t set.

    After a repair, complete the following steps:

    1. Synchronize your iPhone with iTunes or connect to a WLAN network and wait until the time is set.
    2. Remove the SIM tray with the SIM card and reinsert it.
    3. Activate airplane mode on the device and then deactivate airplane mode.
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