Switching your phone to dark mode could be a game-changer for your battery life, especially if you have one of 3 iPhones

Apple

Dark mode in iOS 13.

• Dark Mode, which inverts a smartphone's display to a predominantly black background, was a highly anticipated addition to Apple's iOS 13 release in September.
• Beyond being pleasing to the eye, dark mode can offer significant improvements to battery life.
• Phones with OLED screens, including the iPhone 11 Pro, iPhone XS, and iPhone X will see the greatest battery savings.
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Dark Mode, which makes your iPhone's operating system predominantly black instead of white, was one of the most-anticipated additions when Apple released iOS 13 in September.

Many apps have had a dark version built in for years, and it's popular among users - many people find that it's pleasing to the eyes, and also less harsh in low-light environments. 

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But there might be a bonus to using dark mode, beyond aesthetics: before it was released, experts predicted that dark mode could have huge battery-saving potential. Now we know that it does, especially for OLED screens.

Here's how dark mode can make your phone last longer.