Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Nope, I bought this base iPhone directly from Apple website last year feb. I kinda feel the battery health info maybe false. I do restart, reset the iPhone still show the same. Actually I never check the battery health info ever since I own the base iPhone 15. Just only few months back I go check the first time since everyone so concern about the battery health after install the latest IOS claim draining the battery fast etc. I was shock huh 71 percent?? and my cycle only 280+
Which iOS update do you remember that did you see an issue with that?
 
If you’re still left with 30-40% at the end of the day, I’m not sure why you keep charging it to 100%.

Battery health still drops when it’s kept at 100% for hours at a time and the other factor being heat which could be if you’re using one of those heavy duty cases and MagSafe charging.
That’s why I hate using otter boxes. They also aren’t good enough to wirelessly charge in them
 
If you’re still left with 30-40% at the end of the day, I’m not sure why you keep charging it to 100%.

Battery health still drops when it’s kept at 100% for hours at a time and the other factor being heat which could be if you’re using one of those heavy duty cases and MagSafe charging.
I never use cases. The ever first and last time I use a case is on my ever first iPhone that is iPhone4. I still remember is a case with internal battery. Like 2 in 1. Later from iPhone 6 to now present base iPhone 15 I currently using never use any case. I like that " feel " of holding it naked. On MagSafe charging. I actually happen buy Belkin 5k MagSafe power bank from Apple website. Partly I see my iPhone battery health already 71 percent. I just buy " just in case if Happen I'm outside for a long time and battery drain alot than at least I have a MagSafe power bank to charge last till I go back home "

Well maybe i used to it come charging. I never set to limit 80 percent. Actually by default when you first use your new iPhone from the box. It is default set at 100 percent and battery optimization turn on.
 
Which iOS update do you remember that did you see an issue with that?
As mention I NEVER concern the battery health. I know quite a lot like freak out always check Battery health. If you go reddit , any iPhone subreddit. People always compare their Battery health and cycle charges.

Only Recently First time I go check my iPhone 15 battery health is when I install the current latest IOS. Partly a lot claim the new IOS drain battery fast. At first I do noticed. Some claim is due to usual Index after few weeks will back to normal. ( which is kinda true as currently. I never change my pattern of using the iPhone ) now I noticed come 12am quite standard I will most likely left around 30 percent or lowest ( If that day happen use more than usual ) will drop to around 20+. I never charge it when it go red means below 20 percent so far.
 
  • Like
Reactions: goldmac2006
As mention I NEVER concern the battery health. I know quite a lot like freak out always check Battery health. If you go reddit , any iPhone subreddit. People always compare their Battery health and cycle charges.

Only Recently First time I go check my iPhone 15 battery health is when I install the current latest IOS. Partly a lot claim the new IOS drain battery fast. At first I do noticed. Some claim is due to usual Index after few weeks will back to normal. ( which is kinda true as currently. I never change my pattern of using the iPhone ) now I noticed come 12am quite standard I will most likely left around 30 percent or lowest ( If that day happen use more than usual ) will drop to around 20+. I never charge it when it go red means below 20 percent so far.
I’m just worried if the max capacity drops a lot in a short time! Remember when it was the 5-6 months after I got my 15 Pro? That was a bit of a shocker, wasn’t it? iOS 18.5---> 100% to 99% to 98%, then to 95% and iOS 26 beta 1 to 91%.

Oh, and I saw a  official video on my feed about iOS 26’s new battery life settings. If you’re curious, you can check it out here:
 
I’m just worried if the max capacity drops a lot in a short time! Remember when it was the 5-6 months after I got my 15 Pro? That was a bit of a shocker, wasn’t it? iOS 18.5---> 100% to 99% to 98%, then to 95% and iOS 26 beta 1 to 91%.

Oh, and I saw a  official video on my feed about iOS 26’s new battery life settings. If you’re curious, you can check it out here:
Some feature don't apply in another countries like what clean energy model , adpative mode if I not mistaken. One thing yes , I always turn on Wifi beside 4G. Another thing no doubt my eSim support 5G , I disable to use 4G Always.
I believe these two DO help to save battery A lot.
 
  • Like
Reactions: goldmac2006
Some feature don't apply in another countries like what clean energy model , adpative mode if I not mistaken. One thing yes , I always turn on Wifi beside 4G. Another thing no doubt my eSim support 5G , I disable to use 4G Always.
I believe these two DO help to save battery A lot.
Yeah, the adaptive power mode is technically Apple Intelligence-specific, so it requires an iPhone 15 Pro or later. It senses usage patterns from on-device intelligence and automatically adjusts performance and charging behavior.

Clean energy charging only have it in countries like the USA have it because of energy saver laws and regulations.
 
  • Like
Reactions: Retroworldnews
Obseravtional: I installed teh 26.1 RC, and battery life is a little better. I still have to charge multiple times a day compared to ios 18, but the drain doesn't happen as much.
 
  • Like
Reactions: goldmac2006
I have better battery life since iOS 26.1.

But the big problem with iOS 26 is that it is no longer possible to see the “screen on” details hour by hour. You can only see the percentage of battery used and the total “screen on” time.
And sometimes that time is not calculated correctly.

1761930420576.png


Ok 4h15 of "screen on"... but when !?!
This is a step backward compared to iOS 18.
 
I have better battery life since iOS 26.1.

But the big problem with iOS 26 is that it is no longer possible to see the “screen on” details hour by hour. You can only see the percentage of battery used and the total “screen on” time.
And sometimes that time is not calculated correctly.

View attachment 2574532

Ok 4h15 of "screen on"... but when !?!
This is a step backward compared to iOS 18.
@FeliApple and I did discuss a lot about it in my thread that this change in SOT calculation is marginally less efficient than our older counterparts of iOS versions.

it only makes sense where it calculated based on when you unplug first thing in the morning (after midnight when the calendar turns to the day) instead of intervals based on last charge.

It took it away from single/specific apps too.
 
  • Like
Reactions: FeliApple
@FeliApple and I did discuss a lot about it in my thread that this change in SOT calculation is marginally less efficient than our older counterparts of iOS versions.

it only makes sense where it calculated based on when you unplug first thing in the morning (after midnight when the calendar turns to the day) instead of intervals based on last charge.

It took it away from single/specific apps too.
Yes, and in case you @The_Smarti want to read that, it is discussed here: https://forums.macrumors.com/thread...-section-of-settings-utterly-useless.2459556/


And here: https://forums.macrumors.com/threads/new-anti-consumer-design-battery-usage.2468265/
 
  • Like
Reactions: goldmac2006
That’s why I stopped doing battery endurance testing for my 15 Pro.

I still do it for my Apple Watch to help assess how to minimise charging it for long runs or if I have to work for an extended period (like when I have to go on a business trip in my old job and my Apple Watch needs to only be charged twice to last the 11 hour shift). This is because they still use the older metrics, which were present in older iOS counterparts. The only change Apple made to battery settings on watchOS was to introduce the slow charger feature, which began in iOS 18.
 
  • Like
Reactions: FeliApple
That’s why I stopped doing battery endurance testing for my 15 Pro.

I still do it for my Apple Watch to help assess how to minimise charging it for long runs or if I have to work for an extended period (like when I have to go on a business trip in my old job and my Apple Watch needs to only be charged twice to last the 11 hour shift). This is because they still use the older metrics, which were present in older iOS counterparts. The only change Apple made to battery settings on watchOS was to introduce the slow charger feature, which began in iOS 18.
Yeah, it is utter garbage. Sadly, I think it is here to stay.
 
  • Like
Reactions: goldmac2006
Yeah, it is utter garbage. Sadly, I think it is here to stay.
To be honest, it seems like we’re missing the ability to see how battery usage changes depending on how much we use it and over what time.

I really missed being able to compare data from 24-hour periods to 10-day periods. Instead, iOS 26 made it tricky by aggregating data day by day over the entire 24 hours.

Would we have to do a battery life assessment like we do with trials in experimental testing in a stats, physics, or chemistry lab in school? 😂
 
To be honest, it seems like we’re missing the ability to see how battery usage changes depending on how much we use it and over what time.

I really missed being able to compare data from 24-hour periods to 10-day periods. Instead, iOS 26 made it tricky by aggregating data day by day over the entire 24 hours.

Would we have to do a battery life assessment like we do with trials in experimental testing in a stats, physics, or chemistry lab in school? 😂
You now need a concerted effort to determine actual battery life, whereas before you could just check the graph if the cycle wasn’t older than 24 hours. If it was more than that (and the majority charged it sooner), you could just add the bars per hour and check again later (that’s how I track battery life on every device I have, as I have nothing on iOS (or iPadOS) 26).

Now? Yeah. Good luck…
 
  • Like
Reactions: goldmac2006
Here on 16PM 26.1 RC still battery drain and phone getting sometimes for like no use warmer. Did sign out of iCloud > no change.
Reset setting Na no change. Deleted apps that I don’t use > no change.

Could it be the phone number that’s causing these problems? Using mainly via WiFi and flight mode. I don’t know why the phone sometimes heats up for just browsing.

Phone has 77 battery cycles.
 
You now need a concerted effort to determine actual battery life, whereas before you could just check the graph if the cycle wasn’t older than 24 hours. If it was more than that (and the majority charged it sooner), you could just add the bars per hour and check again later (that’s how I track battery life on every device I have, as I have nothing on iOS (or iPadOS) 26).

Now? Yeah. Good luck…
And I hate to say that I don’t like having to do that with more calculations as iOS 26 lacks the ability to than how iOS can calculate it. Or even figuring it out to pinpoint how much battery per app it takes.
 
  • Like
Reactions: FeliApple
And I hate to say that I don’t like having to do that with more calculations as iOS 26 lacks the ability to than how iOS can calculate it. Or even figuring it out to pinpoint how much battery per app it takes.
Thing is, you can’t even calculate it. If you charge twice in a day, or you use while charging, or the cycle spans two calendar days, or any number of other totally normal factors, the number that appears there is completely useless.

Talk about a ridiculous change… appalling by Apple. The idiots in charge of that screen can’t read a graph.
 
Thing is, you can’t even calculate it. If you charge twice in a day, or you use while charging, or the cycle spans two calendar days, or any number of other totally normal factors, the number that appears there is completely useless.

Talk about a ridiculous change… appalling by Apple. The idiots in charge of that screen can’t read a graph.
The most part of it is all that data and graphs they redesigned totally don’t make any sense whatsoever
 
This is surely made on purpose, to conceal the real battery drain of 26 ff.
Totally 💯 agree

It makes us misinformed about how the usage of our iPhone is perceived instead of just telling us % of battery and the time now vs other days that we are draining x amount of percentage
 
  • Like
Reactions: UliBaer
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.