This professional guide covers the complete disassembly and replacement process for the iPhone 11 Pro Battery, including the removal of the lower acoustic and haptic modules to ensure a safe repair.
⚠️ Pre-Repair Precautions
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Battery Safety: Discharge your battery below 25% before starting. A charged lithium-ion battery can catch fire or explode if accidentally punctured.
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Power Off: Turn off your iPhone completely before beginning disassembly.
- Waterproofing: Opening the display will compromise the waterproof seals. If you do not replace the adhesive gaskets, your phone will no longer be water-resistant.
Phase 1: Remove the Display
Step 1: Remove Pentalobe Screws
- Remove the two 6.9 mm screws located on either side of the Lightning charging port.
Step 2: Heat the Edge
- Use an heat gun or hair dryer to heat the edge of the iPhone. This softens the adhesive holding the display in place.
Step 3: Opening the Phone
1. Suction: Attach a suction cup to the lower half of the screen.
2. Pry: Pull up on the suction cup to create a slight gap between the screen and the rear case. Insert an opening pick.
3. Cut the Adhesive: Slide the pick along the left, right, and bottom edges.
· Caution: Do not insert the pick more than 2-3 mm into the device to avoid damaging internal ribbon cables.
Top Edge: The top is held by clips and adhesive. Gently pull the display assembly slightly down (away from the top edge) to disengage the clips.
Step 4: Open it Like a Book
1. Swing Right: The display cables are on the right side. Open the screen from the left to the right, like opening a book.
2. Support: Prop the screen up against a steady object so it stays vertical. Do not let it hang, as this will strain or tear the delicate cables.
Step 5: Disconnecting the Cables
1. Remove the 4 screws securing the lower battery connector cover
2. Disconnect the lower battery flex cable.
3. Remove Battery Cover: Use the screwdriver to remove the 2 screws securing the battery connector cover.
4. Remove the metal cover with tweezer
5. Disconnect the Battery: Use the tip of a spudger to gently pry the battery connector up from the logic board.
- Warning: Always disconnect the battery FIRST before disconnecting any other cables to prevent shorting out your phone.
6. Remove Display Cable Cover: Remove the 6 screws securing the logic board cover panel over the display cables.
7. Remove the large metal cover.
8. Disconnect the Screen: Use a spudger to disconnect the OLED panel cable, the digitizer cable, and the front panel sensor assembly cable.
Step 6: Remove the Assembly
- The screen assembly is now completely free. Set the chassis aside.
Phase 2: Removing the Speaker and Taptic Engine
The iPhone 11 Pro Max battery is L-shaped. To access and safely pull the lower battery adhesive tabs, it is highly recommended to remove the Taptic Engine and lower speaker.If you are experienced, you can also try removing the battery adhesive strips directly.
Step 7: Remove the Taptic Engine
1. Disconnect the Taptic Engine flex cable
2. Unscrew the 3 screws securing the Taptic Engine.
3. Remove the Taptic Engine
Step 8: Disconnect and Lightning Flex Cable
1. Remove the 2 screws holding the Lightning flex cable bracket
2. Disconnect and gently move the Lightning flex cable aside.
Phase 3: Remove the Battery
The iPhone 11 Pro battery is held by four stretch-release adhesive strips.
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Peel the Tabs: Use tweezers to peel back the black tabs at the edges of the battery.
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The "Slow Pull":
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Grab a tab and pull it horizontally (low angle) away from the battery.
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Pull slowly and maintain constant tension. The strip will stretch several times its original length.
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If a strip breaks, apply a little heat to the back of the phone and use a plastic card to gently pry the battery up. Never use metal tools to pry the battery.
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- Lift out the Battery: Once the strips are removed, the battery will lift out easily.
Phase 4: Reassembly & Calibration
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Clean & Seal: Remove any remaining adhesive residue with isopropyl alcohol. Apply new specialized adhesive strips to the battery and a new waterproof gasket to the frame.
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Reverse Steps: Reinstall the Taptic Engine, Speaker, and cables in reverse order.
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Battery Calibration:
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- Charge to 100% and keep charging for at least 2 more hours.
- Use the phone until it shuts off due to low battery.
- Charge it uninterrupted back to 100%.
Pro Tip: After replacement, the iPhone may display an "Important Battery Message" regarding the "genuine" status of the part. This is normal for DIY repairs and does not affect the actual performance of a high-quality replacement battery.