Google's data showed an nearly linear relationship between display brightness and power consumption.
Similarly, Google also acknowledged the fact that white hue drew maximum power while black barely used any power at all. Material came out three years ago and we change from Holo, which is nice dark theme, to this white theme instead.
And dark mode also used less power when the smartphone example was set to 50 percent brightness. Dark Mode is also easy on the eyes, especially at night and therefore, it is not surprising to see users clamoring for a Dark Mode for most apps. As SlashGear says, there's nothing inherently wrong with the design and layout of the Material Design. Thankfully, dark modes can alleviate the problem and lead to better battery life, and Google wants more devs to add one to their apps. Hopefully, this indicates that Google will continue to add dark themes to its apps as it has done recently with Messages, Phone, and YouTube. It's always been associated with better battery life on devices, especially mobile devices.
A dark theme can reduce battery usage, even with max brightness, by up to 63% on AMOLED displays. This trick doesn't apply to LCD screens, as used in some budget designs (including most low-cost Android phones and the iPhone XR). Battery life differences between dark and light app designs.
But before we get to that, let us stress upon the importance of having a dark (possibly all black) wallpaper for your home and lock screen.
Google's Android Dev Summit has been going on since Wednesday morning and was the site for Google's acknowledgement that foldable displays are coming and that Android will support them. "It helped people make the most of limited phone storage, enjoy their favorite videos and music, and send apps to each other at blazing speeds without using mobile data".
The disparity between the two options on full brightness suggests using dark mode for applications could bring both long and short-term battery benefits.