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Original poster
Apr 12, 2001
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The iPhone has had a Power Reserve function that holds back a small amount of battery life to allow features like Find My and NFC unlocking to work even when your device has died, and in iOS 18, Apple seems to be improving the feature further for the iPhone 15 models.

Generic-iOS-18-Feature-Real-Mock.jpg

As demonstrated on Reddit, when the battery on an iPhone running iOS 18 is exhausted, the phone can continue to show the time in the upper left corner of the device, which is a small but useful upgrade. The battery icon still shows up, and you'll see "iPhone is Findable" while reserve battery is left.

ios-18-iphone-time-off.jpg

It appears that this feature is limited to the iPhone 15 models. We tested on an iPhone 14 Pro Max and were not ale to get the time to show up, but it did work as expected with an iPhone 15 Pro Max.

Power Reserve has been a feature on iPhones dating back to the iPhone XR and iPhone XS, so it's not clear what the limiting factor is in terms of showing the time on display when the battery has drained on older devices.

Article Link: Your iPhone 15 Can Show the Time When It's Out of Battery in iOS 18
 
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anshuvorty

macrumors 68040
Sep 1, 2010
3,397
4,928
California, USA
Because iPhone sales have been slowing down and people are keeping their iPhones longer and longer, Apple is becoming more and more aggressive in creating artificial restrictions to get users to upgrade - this is a classic example. The author even pointed this out in their article - "Power Reserve has been a feature on iPhones dating back to the iPhone XR and iPhone XS, so it's not clear what the limiting factor is in terms of showing the time on display when the battery has drained on older devices."

If you want further proof, look no further than these examples:
 

sw1tcher

macrumors 603
Jan 6, 2004
5,603
19,843
Because iPhone sales have been slowing down and people are keeping their iPhones longer and longer, Apple is becoming more and more aggressive in creating artificial restrictions to get users to upgrade - this is a classic example. The author even pointed this out in their article - "Power Reserve has been a feature on iPhones dating back to the iPhone XR and iPhone XS, so it's not clear what the limiting factor is in terms of showing the time on display when the battery has drained on older devices."

If you want further proof, look no further than these examples:
Maybe the reason none of the prior iPhone models have this exclusive to iPhone 15 series feature is because none of them have A16 chip 6GB RAM Dynamic Island USB-C port that's needed to enable the feature? 🤷‍♂️
 

mansplains

macrumors 6502a
Jan 8, 2021
971
1,522
Because iPhone sales have been slowing down and people are keeping their iPhones longer and longer, Apple is becoming more and more aggressive in creating artificial restrictions to get users to upgrade - this is a classic example. The author even pointed this out in their article - "Power Reserve has been a feature on iPhones dating back to the iPhone XR and iPhone XS, so it's not clear what the limiting factor is in terms of showing the time on display when the battery has drained on older devices."

If you want further proof, look no further than these examples:
While I don't dispute the other points you've mentioned, I find it very hard to believe the clock is a "classic example" of an artificial restriction that would make someone upgrade.
 

mike2q

macrumors regular
Mar 9, 2006
248
574
Apple holding back features is just one way they try and force their customers to keep buying new phones. Their biggest and best strategy though has been to provide just barley enough RAM to work well knowing full well that future iOS releases would need more as would other app updates. That way they can be the hero by still providing software updates while only optimizing for newer devices. That strategy has worked well for years as customers seem blind to the obvious skimping on memory that would have cost hardly anything to increase. Their chickens are coming home to roost though since their Apple AI can't run on anything with less than eight gigs of RAM. Even though the iPhone 12 has a better neural processing engine than the M1 only the later is able to run Apple AI because of memory issues.
Those who are always defending Apples cheaping out on memory need to realize you're getting taken to the cleaners when you pay a premium price for less than optimal specs. That's a stone cold fact.
 

sw1tcher

macrumors 603
Jan 6, 2004
5,603
19,843
maybe it's because of always on display on 15 that sips less power?
Both the iPhone 14 Pro and 14 Pro Max have Always-On Displays while the iPhone 15 and 15 Plus do not, yet only the iPhone 15 (all models) have this feature.

"It appears that this feature is limited to the iPhone 15 models. We tested on an iPhone 14 Pro Max and were not ale to get the time to show up, but it did work as expected with an iPhone 15 Pro Max."


It's the USB-C port. ;)
 
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