Dark mode really can save battery life on OLED iPhones

Testing shows an almost 30 percent increase in battery life!

See PhoneBuff's full test
https://www.youtube.com/watch?v=qbxdHpD5jWw

Read our full story on Engadget: https://www.engadget.com/2019/10/21/dark-mode-ios-13-test/

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