How to Replace MacBook Pro A1398 Battery

Introduction

The 2015 MacBook Pro A1398 has an integrated battery, meaning it is glued into the chassis and not designed for easy removal. However, with the right tools and careful steps, you can successfully replace the battery yourself. This guide provides a step-by-step process for removing and replacing the MacBook Pro A1398 battery.

⚠️ Warning: Replacing the battery requires handling delicate components, and improper techniques can damage your MacBook Pro A1398. If you’re not comfortable doing this yourself, consider taking it to a professional.

Tools & Materials Needed:

• Replacement battery (compatible with MacBook Pro A1398, 2015 model)
• Pentalobe (P5) screwdriver – for the bottom case screws
• Torx (T5) screwdriver – for internal screws
• Plastic spudger – to disconnect battery and pry the old battery out
• Tweezers – for handling small screws and connectors
• Isopropyl alcohol (optional) – for loosening adhesive under the battery
• Plastic cards or a battery removal tool – to safely lift the old battery
• Anti-static wrist strap (recommended) – to prevent electrostatic damage

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Step 1: Power Off & Prepare

1. Back up your data in case anything goes wrong.
2. Shut down your MacBook Pro A1398 completely.
3. Unplug the charger and disconnect all external devices.
4. Work on a clean, static-free surface with proper lighting.

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Step 2: Remove the Bottom Case

1. Flip the MacBook Pro A1398 over and locate the ten (10) Pentalobe screws securing the bottom case.
   • Some screws are shorter than others, so keep track of their positions.
2. Use a P5 Pentalobe screwdriver to carefully remove all screws.
3. Once all screws are out, gently lift the bottom case using your fingers or a plastic spudger.
   • If it’s stuck, wiggle it slightly while applying light force.

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Step 3: Disconnect the Battery

1. Locate the battery connector on the logic board.
2. Use a plastic spudger to carefully disconnect the battery from the logic board.
3. This step is crucial to prevent accidental power surges during removal.

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Step 4: Remove the Trackpad Bracket & Cable

1. Remove the two (2) T5 Torx screws securing the trackpad bracket.
2. Gently lift the trackpad bracket using tweezers.
3. Using a plastic spudger, carefully lift the trackpad cable without damaging it.
   • Note: You don’t need to completely disconnect the trackpad; just free the cable from the bracket.

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Step 5: Remove the Old Battery

1. There is strong adhesive under the battery. Use a plastic card, spudger, or a battery removal tool to pry it out.
2. Start from one side and gently work your way underneath each battery cell.
   • Be very careful to avoid puncturing or bending the battery cells, as they can be hazardous.
3. If the adhesive is too strong, apply isopropyl alcohol to loosen it.
4. Remove each battery section slowly and patiently.

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Step 6: Install the New Battery

1. Align the new battery with the existing screw holes and adhesive sections.
2. Press the new battery down gently so it adheres properly.
3. Reconnect the battery to the logic board.

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Step 7: Reassemble the MacBook

1. Reattach the trackpad bracket and secure it with the two (2) T5 screws.
2. Place the bottom case back onto the MacBook Pro A1398.
3. Secure it with the ten (10) Pentalobe screws, ensuring each one is in the correct position.

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Step 8: Power On & Test

1. Press the power button to turn on your MacBook Pro A1398.
2. If it doesn’t power on immediately, try plugging in the charger.
3. Check if the battery is detected by going to Apple Menu > About This Mac > System Report > Power.
4. If everything is working fine, you have successfully replaced your battery!

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Final Notes:

• Be patient when removing the old battery to avoid damage.
• Dispose of the old battery properly at an e-waste facility.
• If you experience any issues after installation, double-check all connections or consider resetting the SMC (System Management Controller).
• If you prefer professional service, you can send your laptop to a certified repair shop for battery replacement.

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