This guide shows how to remove and replace the battery in your iPhone 16 Pro Max.
iPhone batteries are rated to hold 80% of their capacity for up to 500 charge cycles, or roughly 18–24 months. If your iPhone needs to be charged more often or runs slower, it might be time to replace the battery.
If your battery is swollen, [[What to do with a swollen battery|take appropriate precautions|new_window=true]].
You'll need replacement battery and back glass adhesive to complete this repair.
As of iOS 18.1, battery health works with both genuine and aftermarket replacement batteries.
After your repair, run [link|https://support.apple.com/en-us/120579|Repair Assistant|new_window=true] to reset the battery metrics.
Before you begin
Tape over any cracks
Remove the pentalobe screws
Mark your opening picks
Create a gap using a suction handle
Back glass information
Separate the bottom edge adhesive
Heat the left edge
Separate the left adhesive
Heat the top edge and corner
Separate the top adhesive
Heat the right edge
Separate the right adhesive
Reposition the back glass
Remove the battery connector cover
Disconnect the battery
Remove the back glass connector cover
Remove the back glass
Remove the Taptic Engine cover
Loosen the lower assembly cable
Remove the Taptic Engine
Remove the loudspeaker
Battery adhesive information
Remove the battery
Alternate method to remove the battery
Disassembly complete
Install the replacement battery
Install the loudspeaker
Install the Taptic Engine
Remove the leftover adhesive
Clean the back glass
Clean the frame
Apply the replacement adhesive
Connect the back glass
Connect the battery
Install the connector covers
Remove the final adhesive liners
Install the back glass
Apply heat to the perimeter
Apply pressure to the perimeter
Install the pentalobe screws
After your repair, run [link|https://support.apple.com/en-us/120579|Apple's Repair Assistant|new_window=true]. Navigate to Settings → General → About → Parts & Service History, tap Restart & Finish Repair, and follow the onscreen prompts.
[[Battery Calibration|Calibrate your newly installed battery|new_window=true]] after completing this guide.
Take your e-waste to an [[E-Waste|R2 or e-Stewards certified recycler|new_window=true]].
Repair didn’t go as planned? Try some [[Troubleshooting Problems After a Repair|basic troubleshooting]], or ask our [link|https://www.ifixit.com/Answers/Device/iPhone_16_Pro_Max|Answers community] for help.