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When to replace the iPhone 18 Pro Max battery
- The phone shuts down when the percentage still shows 20 to 30%
- Battery health has dropped below about 80% or battery life is poor
- The back or screen is lifting, which can mean a swollen battery. Stop using it and replace it
Choosing the right part
- Choose a cell with a protection board and a capacity close to the original rating.
- On recent iOS versions a non-genuine battery can show as an unknown part and may not report maximum capacity.
- Always fit fresh adhesive, and never bend, pierce or use metal tools on a battery.
Read the iPhone 18 Pro Max battery replacement guide
Other iPhone 18 Pro Max parts
Screen Charging port Back glass Camera lens Loudspeaker Earpiece speaker Flex cable Adhesive Repair tools
Common questions
Do you supply batteries for the iPhone 18 Pro Max?
Yes. We supply iPhone 18 Pro Max batteries to repair shops at trade prices. Order the adhesive with it.
How do I know the iPhone 18 Pro Max battery needs replacing?
The phone shuts down early, battery health is low or battery life is poor. A swollen battery needs replacing straight away.
Is it safe to replace?
It is for a trained technician. Discharge below 25%, avoid metal tools on the cell and never bend or pierce it.