A test showed that activating dark mode on your iPhone can increase the battery life by 30 per cent.
The experiment was shared on YouTube comparing two smartphones - one on light mode and the other on dark mode until the phone ran out of battery.
The iPhone on light mode died while the dark mode phone had 30 per cent battery remaining.
The team behind the YouTube video used two robotic arms for the test which used the iPhones through a variety of apps like a standard user.
Two hours into the experiment the dark mode iPhone was on 88 per cent and the light mode phone was on 83 per cent.