Uploaded December 2024 | Updated September 2026, 2 weeks ago

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Learn how to replace and calibrate your iPhone 16 Pro Max battery, fix the 'Unknown Part' error, and restore performance with this detailed guide.
Buy tools and parts on AMAZON:
Screwdriver Set: hfixt.com/mpro
Pro Toolkit: hfixt.com/tool
Magnetic Mat: hfixt.com/mat
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Battery: amzn.to/41u5LMF

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Adhesive sealant: hfixt.com/ip16a
Battery: hfixt.com/ip16mbs
Screwdriver Set: hfixt.com/alis
Opening Tool Kit: hfixt.com/alit
Magnetic Mat: hfixt.com/amat
Tweezers set: hfixt.com/altz

📌*Useful links*
More DIY repair guides: how-fixit.com

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*Description*
Discover how to replace your iPhone 16 Pro Max battery and restore its performance in this step-by-step tutorial. This repair guide covers everything you need, from required tools and techniques to calibration tips and fixing the 'Unknown Part' error message.
*What’s included in this guide?*
- Tools you'll need, including links for purchase.
- Proper methods for safely disassembling your iPhone.
- Step-by-step instructions for replacing and calibrating the battery.
- Tips to resolve common Repair Assistant issues.
- How to restore water resistance for optimal protection.
Get your iPhone 16 Pro Max running like new again without the hassle of costly repairs. Follow along for a DIY solution that saves money and ensures top performance.
Don’t forget to give this video a thumbs up, subscribe for more tutorials, and visit our website for additional tips and repair guides. Let's fix it together!

Key Takeaways
✅Replace the iPhone 16 Pro Max battery to restore performance.
✅Safely disassemble the iPhone with step-by-step guidance.
✅Learn how to fix the 'Unknown Part' error using Repair Assistant.
✅Restore water resistance with new adhesive tape.
✅Save money with this DIY battery replacement tutorial.

🎬Time Codes
00:00 Intro to Battery Replacement Tutorial
00:27 Tools Needed for Repair
00:49 Preparing for Disassembly
01:09 Removing the Back Glass
03:40 Disconnecting Battery Cables
05:19 Removing Adhesive Strips
05:50 iPhone battery adhesive strips broke
06:35 Replacing the battery
06:48 Reassembling iPhone
08:14 Installing the New Battery
09:40 Calibrating with Repair Assistant
10:36 Troubleshooting Repair Issues
11:00 Third party battery replacement issue
11:19 iPhone battery activation lock
12:05 Restoring Water Resistance
16:12 Final Assembly and Testing

🌟FAQ:
Question 1: What tools are required for iPhone 16 Pro Max battery replacement?
Answer 1: Tools include HowFixit screwdriver set, tweezers, a suction cup, plastic pry tools, waterproof adhesive tape, and more.

Question 2: How do I fix the 'Unknown Part' error after replacing the battery?
Answer 2: Use the Repair Assistant tool in the Settings menu to calibrate the new battery. Ensure your device has a stable Wi-Fi connection and sufficient charge.

Question 3: What if the adhesive strips tear during removal?
Answer 3: Apply isopropyl alcohol to soften the adhesive and carefully remove the battery.

Question 4: Can I restore water resistance after replacing the battery?
Answer 4: Yes, apply new waterproof adhesive sealant tape to the frame for full water resistance.

Question 5: Can I replace the battery with a third-party part?
Answer 5: Yes, but third-party batteries might not calibrate properly, and the 'Unknown Part' status may persist.

AFFILIATE PROGRAM
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