The cost to replace an iPhone battery varies depending on the model and whether you have AppleCare+ coverage.

• For iPhones covered by AppleCare+ or still under warranty, battery replacement is free if the battery holds less than 80% of its original capacity

• Without AppleCare+, Apple charges between $69 and $99 for battery replacement depending on the model:
  • $69 for older models like iPhone 8 and earlier
  • $89 for most newer models including iPhone 11
  • $99 for the latest models such as iPhone 14 and iPhone 15 series

• In the U.S., for example, replacing an iPhone 11 battery costs $89 out of warranty

• Third-party repair shops may offer similar or slightly lower prices, but using Apple or authorized providers ensures genuine parts

• Battery replacement kits for DIY repair cost around $40 for older models and about $60 for newer ones like iPhone 15, but this requires technical skill

In summary, expect to pay roughly $69 to $99 for an official Apple battery replacement if out of warranty, with free replacement possible under AppleCare+ or warranty conditions