The newest iPhones don't have the software that slows iPhones down when they get old (AAPL)

Hollis Johnson

• In 2017, Apple issued a software update that began slowing down older models of iPhone when their batteries got old. 
• This software does not affect the newest iPhone models introduced in the last year, including the iPhone 8, iPhone 8 Plus, and iPhone X, according to Apple.

In a letter to Congress released on Tuesday, Apple that the iPhone 8, iPhone 8 Plus, and iPhone X aren't affected by software updates that slow down iPhones with old batteries.

"iPhone 8, iPhone 8 Plus, and iPhone X models include hardware updates that allow a more advanced performance management system that more preciesly allows iOS to anticipate and avoid an unexpected shutdown," Apple public policy VP Cynthia Hogan wrote in a letter to the US Senate. The iPhone 8 and 8 Plus were introduced in September; the iPhone X in November. See the rest of the story at Business Insider

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SEE ALSO: Apple says it told customers it was slowing their iPhones from the beginning — but it just told Congress a different story