Use Dark Mode Everywhere to Save Battery on OLED Screens

The Problem

Your phone dies by 3 PM. The bright white screen is the biggest power drain.

The Hack

Enable system-wide dark mode: iPhone: Settings > Display > Dark. Android: Settings > Display > Dark Theme. Most apps follow the system setting.

Why It Works

OLED screens turn off pixels to display true black. Dark mode means most of the screen is off, using dramatically less power than illuminating white pixels.

Pro Tips

• Biggest impact on OLED/AMOLED screens (most modern phones)
• Saves 30-50% display power — the largest battery drain
• Also reduces eye strain in low-light environments
• Most apps support dark mode automatically when system is set