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Battery replacement of iPhone 12

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Battery replacement of iPhone 12

Added on 06.11.2021

Technical difficulty

Medium difficult

Duration of the procedure

60 minutes

Number of steps in the tutorial

Overview of individual steps
01 Removing the pentalobe screws
02 Opening 1
04 Opening 3
05 Removing the battery connector and display cover
06 Disconnect the battery
07 Disconnect the OLED display + digitizer
08 Remove the front sensor connector cover
09 Disconnect the front sensor connector
10 Remove the display assembly
11 Peel off the old glue around the edges of the iPhone
12 Peeling off the adhesive handles
13 Battery removal
14 Stick new adhesive tape on the new battery
15 Insert a new battery into iPhone
16 Glue a new adhesive around the edges of the iPhone
17 Replacing the iPhone

Apple batteries are able to maintain 80% capacity during 500 charge cycles, which for most users take approximately 18-24 months. Battery wear means charging more often, but it can also slow down your iPhone, so use this guide to restore full performance to your device.

This manual also includes instructions for completely disconnecting the display, removing the bottom speaker, and the taptic engine, for better access to the battery sealing strips.

After completing the repair, calibrate your new battery for optimal performance. Charge the battery to 100% and let it charge for at least another 2 hours. Then use iPhone until it's fully discharged, then charge to 100% without interruption.

Step 1
Removing the pentalobe screws

Before starting, it is necessary to discharge the iPhone below 25% because a charged Li-ion battery can ignite or explode if accidentally cut.

Turn off iPhone
Unscrew the two 6.75mm long pentalob screws on the bottom edge of the iPhone using a Pentalobe screwdriver (Ph0001.2)

Opening iPhone will break its waterproof seal, so have a replacement seal ready before beginning this step. Without a new seal, your iPhone will not be waterproof.

Step 2
Opening 1

Warming the bottom edge of iPhone helps soften the screen protector and make it easier to open.

Using a hair dryer or heat gun, heat the bottom edge of iPhone for about 3 minutes to bring the temperature to about 80 ° C.
Do not put iPhone in the microwave !!!

Step 3
Opening 2

Place the suction cups near the bottom edge of iPhone, one at the front and the other at the back, and gently push it into place.
Hold your iPhone securely and use gentle suction cups to separate the screen from the back of the phone.
After separating the display approx. 3 mm from the back, insert the Fixservis card into the gap.

The glue that holds the display in place is very strong, so creating this initial gap requires considerable force. If you have difficulty, reheat the bottom edge and gently slide the screen up and down repeatedly to weaken the glue until you create a gap to insert the Fixservis card.

Step 4
Opening 3

After successfully releasing the adhesive from the edges, remove the suction cups.
Open iPhone by turning the display to the left like a book.
We recommend that you support the display so that you do not tear off the flat cable that holds the display from the system board.

For now, don't try to completely detach the display, as a few fragile flat cables still connect it to the iPhone's motherboard.

Step 5
Removing the battery connector and display cover

Removing the battery connector and display cover #1

Removing the battery connector and display cover #2

Remove the two 1.1 mm long screws using a Pentalobe screwdriver (Y) securing the connector cover and remove at the same time.

Throughout the repair, follow each screw to make sure it returns exactly where it came from to avoid damaging your iPhone.

Step 6
Disconnect the battery

Use the tip of the Spudger to disconnect the battery connector on the system board from the system board.
Bend the connector slightly away from the system board to prevent accidental contact with the outlet and power to the phone during repair.

Step 7
Disconnect the OLED display + digitizer

Disconnect the OLED display + digitizer #1

Disconnect the OLED display + digitizer #2

Disconnect the OLED panel and digitizer cable connector using the Spudger.

Step 8
Remove the front sensor connector cover

Remove the front sensor connector cover #1

Remove the front sensor connector cover #2

Using a Pentalobe screwdriver, remove the four screws that secure the front sensor connector cover:

- Three screws 1.1 mm long

- One 1.4 mm long screw

Then remove the cover.

Throughout the repair, follow each screw to make sure it returns exactly where it came from to avoid damaging your iPhone.

Step 9
Disconnect the front sensor connector

Disconnect the front sensor connector #1

Disconnect the front sensor connector #2

Disconnect the front sensor assembly cable connector using the Spudger or nail.

Step 10
Remove the display assembly

Remove the display assembly.

Step 11
Peel off the old glue around the edges of the iPhone

Remove the old glue along the edges of the iPhone.

Step 12
Peeling off the adhesive handles

Four pieces of stretch glue hold the battery in place - two at the top edge and two at the bottom edge.
Each piece of glue has black gluten at one end, which is easily glued and folded to the top of the battery.
Using blunt tweezers, grasp the tabs at the same time and slowly pull the adhesive away from the battery.
Repeat this process from all sides.

Step 13
Battery removal

Remove the battery.
When removing the battery, clean the inside of the iPhone with an IPA Plus Cleanser designed to clean electronic contacts.

Step 14
Stick new adhesive tape on the new battery

Peel off the blue plastic sheet from the new set of adhesive tapes and discard.
Carefully place the adhesive tapes on the battery and stick them in place as shown.
Use your fingers or a cloth to firmly press the strips into place on the battery.
Press the center to attach the black control label to the battery as well.

Step 15
Insert a new battery into iPhone

Carefully insert the battery into the iPhone.
Make sure the battery connector is in line with the system board.

Step 16
Glue a new adhesive around the edges of the iPhone

Glue a new adhesive around the edges of the iPhone #1

Glue a new adhesive around the edges of the iPhone #2

Glue a new gluten to the edges of the iPhone.
Reconnect the battery.

The new adhesive will ensure the iPhone's resistance to water and dust.

Step 17
Replacing the iPhone

To reinstall, follow these instructions in reverse order.

Going Green

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More info

Choose device

Battery replacement of iPhone 12

Technical difficulty

Duration of the procedure

Number of steps in the tutorial

Step 1 Removing the pentalobe screws

Step 2 Opening 1

Step 3 Opening 2

Step 4 Opening 3

Step 5 Removing the battery connector and display cover

Step 6 Disconnect the battery

Step 7 Disconnect the OLED display + digitizer

Step 8 Remove the front sensor connector cover

Step 9 Disconnect the front sensor connector

Step 10 Remove the display assembly

Step 11 Peel off the old glue around the edges of the iPhone

Step 12 Peeling off the adhesive handles

Step 13 Battery removal

Step 14 Stick new adhesive tape on the new battery

Step 15 Insert a new battery into iPhone

Step 16 Glue a new adhesive around the edges of the iPhone

Step 17 Replacing the iPhone