But when they start to emerge from warranty on the one-year anniversary of purchase, Apple will charge $99 to replace the batteries in them.The move shows that Apple is still adjusting prices in response to higher costs for labor and parts.Although inflation has recently slowed in the U.S., the company said last year that inflation had affected its business, and it raised iPhone prices in several international markets.In late 2017, users discovered that Apple had added some software code that slowed down iPhones with older batteries that had been mostly used up, to prevent the whole iPhone from unexpectedly shutting down because of the weak battery.The battery replacements were massively popular and lots of iPhone owners opted for the cheap tuneup, straining Apple's retail stores before the program ended and prices rose again."