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When Dark Mode was marketed as a headline feature in iOS 13, Apple promoted it as an alternative new look that was easier on the eyes when viewed in dark environments. Oddly though, Apple never mentioned that it also potentially offers energy-saving benefits - particularly for OLED iPhones, since pixels on an OLED panel are individually powered and true black pixels remain inactive.


That potential battery saving has now been put to the test. In an experiment shared on YouTube, PhoneBuff used robotic arms to interact with two fully charged iPhones running iOS 13, with one running in Dark Mode and the other in Light mode. The robots worked their way through various native and third-party apps, all of which support both iOS display modes, until the iPhones died.

The results are pretty conclusive: The test found that an iPhone XS Max using Dark Mode uses up significantly less battery than an iPhone XS Max using Light Mode. When the Light Mode-enabled iPhone XS Max died, the Dark Mode iPhone XS Max still had 30 percent battery life remaining.

dark-mode-battery-savings.jpg

PhoneBuff notes one important variable in his test that conditioned the results: The iPhones both had their displays set to 200 nits brightness. At 100 nits, which is what you'd expect indoors, two hours on Twitter saved just 5 percent more battery in Dark Mode. The same test performed at 300 nits, which is closer to outdoors use, saw Dark Mode save 12 percent battery.
[*]How to Enable Dark Mode in iOS 13Either way, the test appears to prove that Dark Mode is a significant battery saver for OLED iPhones, which include the iPhone X, iPhone XS, and iPhone 11 Pro, but not the iPhone XR or iPhone 11. You can watch the video embedded above for the full lowdown.

Article Link: iOS 13's Dark Mode Extends OLED iPhone Battery Life, Test Confirms
 
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XS Max with bigger battery against XS. Unless it’s just a typo this test is completely invalid as the Max is expected to last longer.

“The test found that an iPhone XS Max using Dark Mode uses up significantly less battery than an iPhone XS using Light Mode.”

if you read the entire paragraph, it’s pretty clear that the word “Max” was dropped for the sake of readability, and both phones were Max models.
 
XS Max with bigger battery against XS. Unless it’s just a typo this test is completely invalid as the Max is expected to last longer.

“The test found that an iPhone XS Max using Dark Mode uses up significantly less battery than an iPhone XS using Light Mode.”

I guess it is just a typo, why would anyone compare two different models in order to test dark mode?
I have dark mode set on my Xs and I think I'm getting more battery life, but I wouldn't say it is changing the way I charge my iPhone, I can simply get to the end of the day with a few more battery left.
I'd set dark mode even if it consumed more power, as I like it best especially in low light
 
Apple will introduce the new "Superdark Mode".

In Superdark Mode, the screen will be all black, deep black, no matter what the user does. It effectively extends battery time by more than 10 hours.

Superdark Mode will be controlled remotely by the Chinese government and is expected to be introduced this Christmas to iPhone Users in Honk Kong, Macau and Mainland China.

Superdark Mode will be available in the US and several other countries next year.
 
No surprise considering how OLED handles black (actually turns the pixel off), but it is surprising just how much more battery life you get.
 
What about those of us that use screen curtain in voice over mode? How does this function work on OLED screens? On my iPhone 7 Plus the backlight is still on even when screen curtain is on.
 
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Sure, it may be obvious, but going beyond the title, it's still interesting to see by how much and in which circumstances.
exactly. these same exact people who are feigning their surprise would be screaming at apple to quantify it if they outright said that darkmode increases battery life. while many things are obvious, it's helpful to actually perform an experiment to PROVE it.
 
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Haven’t been able to view the video. How many times was the test repeated? And on how many devices?

To help eliminate potentially anomalous results, I would have thought at least a few repeats - and separately, variations in the device used to test - would be in order…
 
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Interesting. So turning off some of the pixels on the display really does improve battery life? Who would have thought?!


/s
 
Would Dark Mode also help in a Mabbook Pro laptop?
No, it wouldn't actually!

Here's why:
The MacBook Pro uses an LCD display. LCD displays work by back-lighting the entire screen uniformly, then shining that through some crystals that poralise the light such that it either can or cannot come through.

Thus, regardless of the colour presented, you get the same amount of battery drain.

However, turning down the screen brightness does save power, but that also diminishes the whites. (which may or may not be a good thing)

OLED screens emit the light they need to emit per pixel. There is no backlight. Therefore a black pixel uses less power than a white one, because it requires more power to make more light.

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lol @ all the people saying "well, duh". Just because it seems obvious doesn't mean it isn't worth investigating and confirming.
 
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