One of the big new features of Google’s Android 10 update, which is now live on all Pixel devices and a growing list of other Android phones, is Dark Theme.

It's essentially a dark mode for your whole device that flips the color palette of all menus and nearly every native Google app, including YouTube and Chrome. It also works with some third-party apps such as Instagram and Reddit – expect the list of supported apps to expand over time too.

So why is it a big deal? Given that your screen is your phone’s biggest battery drain, pumping out less light should give you longer between charges. Google claims Dark Theme can “reduce power usage by a significant amount”, depending on the screen tech of the device you’re using.