You can extend your phone's battery life with a few simple settings and a wallpaper change. While phones and other electronics are getting more expensive, it's worth exploring ways to get more use out of the device you have. The good news is that if your phone has an OLED or AMOLED display, there are a few easy tweaks to help reduce battery drain. The display is the most active part of your smartphone, so finding ways to reduce its workload is key to saving battery life. One simple way to do this is by adding a black wallpaper and enabling dark mode on your device. This works because OLED panels draw very low power due to their structure, which operates on a per-pixel basis rather than a constant backlight like LCD. Black color consumes the least power (~250 mW), while white takes up around 1,250 mW. You'll notice a significant difference in battery efficiency between light mode and dark mode, especially in direct sunlight. However, setting a deep black background on the home screen could result in higher contrast and readability issues for some people. A 2025 study found that a specific shade of dark grey significantly reduced reading errors, while dark blue led to faster text reading. If you want the best of efficiency and readability, opt for a dark grey background in dark mode. Here's how to set up both settings on your iPhone or Android device. On an iPhone, go to Settings > Display & Brightness > Dark to turn on dark mode. You can also schedule dark mode from 6 p.m. to 11 a.m. or add a dark mode toggle in the Control Center for easy access. To add a black or dark wallpaper on an iPhone, find a suitable image, download it, and set it as your wallpaper on both the home screen and lock screen. On an Android phone, the settings menu varies by brand, but you can usually find dark mode under Settings > Display > Dark. You can also schedule dark mode on Android phones, and some brands offer solid color options for wallpapers. The combination of dark mode and a near-black background should help your phone last longer on a single charge. While these settings and wallpapers can help extend battery life, it's also important to consider other factors like power-saving modes, software updates, and responsible app usage to maximize your phone's efficiency.
