Battery draining faster after updating to iOS 27? Don’t panic … - 9to5Mac

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If you’ve just updated your iPhone to iOS 27, you may have felt concerned after seeing your battery draining faster than usual, as well as your device getting hot in normal use. While both effects may be very real, they are only temporary … Any time you update to a new version of iOS, there will be some things going on in the background for some time afterwards. These CPU-intensive background processes will often see your iPhone getting hotter than usual, and consuming significantly more battery power.

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