Does the dark mode save battery life?

Yes, using dark mode typically saves more energy. Some phones include a function called “dark mode” that allows you to change the interface background’s color to something darker.

The feature darkens the operating system’s or an app’s color scheme. It has been discovered that switching to dark mode will lengthen the battery life of your phone. The brightness of your screen and the type of display on your phone determine how much power is saved.
On OLED panels as opposed to LCD displays, dark mode is more useful. According to a Purdue University study, moving from light to dark mode at 100% brightness results in an average battery power savings of 39%–47%. Switching to dark mode can increase your iPhone’s battery life by 30%, per a recent PhoneBuff test.