Tech giant Apple might be slowing down old iPhones that have low capacity batteries, Reddit users have noticed.
According to The Verge, Geekbench developer John Poole has mapped out performance for iPhone 6S and iPhone 7 over time, and has concluded that Apple's iOS 10.2.1 and 11.2.0 updates introduce this throttling for various devices.
Moreover, iOS 10.2.1 is particularly relevant, as the update was designed to reduce random shutdown issues for iPhone 6 and iPhone 6S.
Geekbench also reports that iOS 11.2.0 introduces similar issues for iPhone 7.
Apple's fix appears to be throttling the CPU to prevent the phone from randomly shutting down.
However, some Reddit users have reported that replacing their batteries has returned performance and CPU clock speeds back to normal.
Apple remained unavailable for comment, so far.