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Apple iPhone 12 Pro Max Battery Replacement

Battery Replacement guide for the Apple iPhone 12 Pro Max

Moderate
~52 min
23 steps

Before you begin

Tools

  • Pentalobe P2 screwdriver
  • Tri-point Y000 screwdriver
  • Phillips #000 screwdriver
  • Suction cup handle
  • Plastic opening picks
  • Spudger tool
  • Tweezers
  • Heat gun or hair dryer

Parts / materials

  • Replacement iPhone 12 Pro Max battery
  • Pre-cut battery adhesive strips
  • Display frame adhesive seal
  • High-concentration isopropyl alcohol (90%+)

Safety

  • Discharge battery below 25% before starting repair to prevent thermal events.
  • Wear safety eye protection against potential glass splinters or battery punctures.
  • Keep heating tools below 80°C (176°F) to avoid damaging internal components.
  • Never pry directly against the battery with sharp or conductive metal tools.

Overview

# Apple iPhone 12 Pro Max Battery Replacement Repair Guide Action-specific battery replacement walkthrough for the Apple iPhone 12 Pro Max. About 52 minutes across 23 steps. This DIY guide walks through battery replacement on the Apple iPhone 12 Pro Max (iPhone series phone). Before you open the device, confirm the exact model number on the Apple settings screen or rear housing so your replacement part matches the iPhone 12 Pro Max specifically—not a similar iPhone sibling. Most DIY techs finish this Apple iPhone 12 Pro Max battery replacement in about 52 minutes when parts and tools are ready. Difficulty is rated intermediate for this model. Recommended tools for this Apple iPhone 12 Pro Max job: Pentalobe P2 screwdriver, Tri-point Y000 screwdriver, Phillips #000 screwdriver, Suction cup handle, Plastic opening picks, Spudger tool, Tweezers, Heat gun or hair dryer. Parts and supplies: Replacement iPhone 12 Pro Max battery, Pre-cut battery adhesive strips, Display frame adhesive seal, High-concentration isopropyl alcohol (90%+). Power the iPhone 12 Pro Max off completely, remove SIMs/SD cards if present, and work on a clean, well-lit surface with a magnetic mat for screws. If a step feels wrong for your Apple iPhone 12 Pro Max, stop and compare the connector layout to the photos in this guide. When you prefer a same-day pro repair in Seattle instead, LML Repair can handle battery replacement for this model with tested parts and a workmanship warranty.

Step-by-step

  1. 1

    Power off the device

    1 min

    Turn off your iPhone completely before starting disassembly. This prevents electrical shorts during the repair.

  2. 2

    Remove pentalobe screws

    2 min

    Unscrew the two 6.7 mm P2 Pentalobe screws located on the bottom edge of the iPhone next to the Lightning port.

  3. 3

    Heat the bottom edge

    2 min

    Apply a heat gun or hair dryer on low setting to the bottom edge of the screen for two minutes to soften the display adhesive.

  4. 4

    Attach a suction cup

    1 min

    Place a suction cup on the lower portion of the screen just above the Lightning port.

  5. 5

    Pry the display up

    3 min

    Pull up firmly on the suction cup to create a small gap between the screen assembly and the outer frame.

  6. 6

    Insert an opening pick

    2 min

    Insert a plastic opening pick into the gap at the bottom edge of the frame.

  7. 7

    Slice the bottom seal

    2 min

    Slide the pick back and forth along the bottom edge to slice through the perimeter adhesive.

  8. 8

    Slice the left edge seal

    2 min

    Carefully slide the opening pick up the left edge of the phone to separate the adhesive.

  9. 9

    Slice the right edge seal

    2 min

    Slide the pick up the right side of the device, keeping insert depth under 3 mm to avoid damaging display cables.

  10. 10

    Open the display screen

    2 min

    Gently swing the display open from the right edge like opening a book cover.

  11. 11

    Unscrew the logic board shield

    3 min

    Remove the four Tri-point Y000 screws securing the lower logic board connector cover plate.

  12. 12

    Remove the shield plate

    1 min

    Use precision tweezers to lift the metal shield plate away from the logic board.

  13. 13

    Disconnect the battery

    2 min

    Pry the battery connector straight up off its socket using the flat end of a spudger.

  14. 14

    Disconnect screen cables

    2 min

    Disconnect the display panel and digitizer flex cables from the logic board.

  15. 15

    Separate the display assembly

    1 min

    Lift the display assembly away from the enclosure entirely and store it in a safe place.

  16. 16

    Unscrew the Taptic Engine

    3 min

    Remove the Tri-point Y000 and Phillips screws securing the Taptic Engine and lower speaker cover.

  17. 17

    Remove the Taptic Engine

    2 min

    Lift out the Taptic Engine module to clear access to the bottom battery adhesive pull-tabs.

  18. 18

    Locate adhesive pull-tabs

    2 min

    Unpeel the black pull-tab tips attached to the upper and lower edges of the battery.

  19. 19

    Pull adhesive strips

    5 min

    Slowly pull each adhesive strip out horizontally at a flat angle until it stretches out from under the battery.

  20. 20

    Dissolve stubborn adhesive

    3 min

    If a strip breaks, apply a few drops of high-concentration isopropyl alcohol along the battery edge and wait two minutes.

  21. 21

    Lift the old battery

    2 min

    Use a plastic spudger to gently lift the battery out from the frame without bending it.

  22. 22

    Apply new battery strips

    2 min

    Adhere pre-cut battery adhesive strips onto the back of the replacement battery assembly.

  23. 23

    Install the new battery

    5 min

    Set the new battery carefully into the frame, press firmly to secure, and reassemble the device in reverse order.

After your Apple iPhone 12 Pro Max battery replacement

Power the iPhone 12 Pro Max back on and test the battery replacement function before you put every screw away. Check touch/display response, charging, cameras, buttons, and wireless as relevant to this repair. If something fails after closing the device, reopen carefully and reseat the connectors for this Apple iPhone 12 Pro Max job before assuming the part is defective. Keep leftover adhesive and screws labeled in case you need a second pass.

Keep learning

Explore more Apple iPhone 12 Pro Max repair context in the encyclopedia, or open related DIY guides.

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