In this post, we’ll walk you through the process shown in our latest iPhone 12 Pro Max battery replacement video.
Important Disclaimer
This video and blog are for entertainment purposes only. The procedure involves high-risk operations that may damage your device or compromise its safety features. Non-professionals should not attempt DIY repairs, especially those involving battery disassembly or the use of chemical solvents like ethanol. BatteryMall is not responsible for any damage resulting from self-repair attempts.
Battery Replacement Overview
In this repair, the technician uses a transplant method: the original BMS board from the iPhone’s original battery is reused and attached to a set of high-capacity battery cells. This method allows the iPhone to retain its original battery identity, maintaining iOS compatibility and full functionality.
After transplanting, the battery’s reported efficiency starts at 70%. However, after several charge cycles and computer calibration, the battery can slowly recover to 100% efficiency.
Step-by-Step Battery Replacement Process
1. Air Tightness Test
Before opening the phone, an air tightness test is performed. In this case, it fails, indicating a previous repair or compromised waterproofing.
2. Remove the Bottom Screws
Unscrew the two pentalobe screws located at the bottom of the iPhone near the Lightning port.
3. Apply Absolute Ethanol
Drop absolute ethanol around the screen edges to soften the waterproof adhesive.
4. Open the Phone and Disconnect Battery
Carefully open the device and disconnect the battery to prevent short circuits.
5. Clean Residual Waterproof and Battery Adhesive
Use plastic tools and cleaning fluid to remove leftover waterproof glue and battery adhesive.
6. Transplant and Install New Battery
Install the new high-capacity battery cells with the original BMS board, and secure the battery connector.
7. Reconnect the Display Interfaces
Reconnect the screen interface cables and secure them properly.
8. Preheat the Phone
Preheat the device for 2 minutes to soften the adhesive and aid resealing.
9. Press the Screen Firmly for 5 Minutes
Once the screen is closed, gently but firmly press the phone to ensure proper sealing and adhesion. Hold the pressure for 5 minutes using clamps or by hand with a soft cloth to avoid damage.
10. Initial Battery Efficiency Check
After powering on, the battery shows 70% health—a normal result after transplanting. The battery will gradually improve after a few charge cycles.
For a safe and reliable replacement, consider using high-quality replacement batteries from trusted suppliers.
If this article doesn't fix your iPhone battery issue, you can find a compatible replacement battery at BatteryMall.com.
To learn more about iPhone batteries and get useful tips, please visit our support blog:BatteryMall.com/blogs/support
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