Apple’s latest operating system, iOS 13 adds support for Dark Mode. The result of battery testing shows that activating Dark Mode can extend iPhone power with an OLED screen.
Dark Mode is a mode that changes the white background in iPhone apps to a dark or black one. iPhone owners can activate the feature for a certain amount of time or permanently.
Dark Mode on iOS 13 Experiment
A YouTube channel, PhoneBuff, tries an experiment that involves two iPhones, one that ran Light Mode and one with Dark Mode on. The test in the video uses two fully charged iPhone XS and two robotic arms, which are programmed to do various things on the screen when the device is in Light Mode and Dark Mode.
Robotic arm tasks include typing text in the Messages application, scrolling through Twitter, playing videos on YouTube, and accessing Google Maps. When the iPhone XS battery in Light Mode runs out, phones with Dark Mode still have around 30 percent of the remaining power.
Testing is done with both screens at 200 nits brightness. And, iPhones at different brightness levels can cause different percentage results as well, although the longer battery life for iPhone in Dark Mode remains true.
Quoted from Digital Trends, Monday (10/21/2019), black on the OLED screen means the pixels are turned off. With more pixels deactivated in Dark Mode than in Light Mode, the resulting increase in battery efficiency.
In comparison, iPhones with LCD screens like the iPhone 11 still have pixels turned on when displaying black colors, so they can’t enjoy longer battery life when in Dark Mode.
To activate Dark Mode on an iPhone that is running iOS 13, users only need to access the Settings application and enter the Display & Brightness menu. The option to switch permanently to Dark Mode is under the Appearance header. If the users who only want to activate the feature at a certain time, there are options to automatically turn it on or off for a customized period of time.