Screen Color and Battery Life
As many people know, the screen is the greatest power draw on today’s touchscreen handsets. Did you know that you can control the amount of battery your device uses by simply changing the color of the background of your screen?
I just tested the power draw on a Samsung Captivate with 3 types of screens:
Animated backdrop: 800 mW
White backdrop: 570 mW
Black Backdrop: 370 mW
The brighter and lighter your screen, the more energy your phone uses. Consider this while building your apps – a darker background will save battery.