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ios26 will destroy your battery life with all the gimmick animations & transparency. The best thing you can do for your phone is not update to ios26
Boo hoo mine only supports iOS 18. Apparently I'm a whopping 8 major releases behind the latest kit.

Hint: my phone can still make calls, play music/poddies, browse the web and use all the apps I want. As an added bonus, it fits in my pocket as it's got a 5.4" screen. I don't actually want to 'upgrade' it as Apple's decided that small <> good. Thinner, however...
 
Then something is wrong with your iPhone.
Because on my iPhone 16 Pro, I easily get two days of use. With Music, Photos, Notifications and walks.
Even my iPhone SE from 2015, which I still use today, only needs 20% battery power per day without any third-party apps.

Do you have a social media app that checks for new messages every three seconds? Or are you using a "radiation protection case"? It's also possible that it's a poorly programmed app. Check the battery statistics.
I don’t use any social media or case. I barely have any apps installed. I have a second iPhone for work that doesn’t have this issue, so it could well be a problem with the phone.
 
its because they used recycled batteries since iPhone 14.

No... the intend has always been to produce batteries with recycled materials. That doesn't mean batteries are lower in capacity or quality.


My iP 13 Pro Max shows 89% capacity since like a year. I don’t think it’s really reliable.

For comparison: my iPhone 13 mini show an estimated 86% capacity. Usage about 80-90 minutes per day. I have most options turned off that activate the screen - reduced the amount of notifications, including scheduled do-not-disturb.

But this is just an estimate. Next to how you use the phone, external factors beyond your control also can drain the battery. The applications that drain more/less after consecutive updates. If an iCloud account is in use, activity on iCloud can also use some energy on the phone. Technical changes in the mobile network and/or 3rd party wifi networks you use. There are so many factors in play.
 
For comparison: my iPhone 13 mini show an estimated 86% capacity. Usage about 80-90 minutes per day. I have most options turned off that activate the screen - reduced the amount of notifications, including scheduled do-not-disturb.

But this is just an estimate. Next to how you use the phone, external factors beyond your control also can drain the battery. The applications that drain more/less after consecutive updates. If an iCloud account is in use, activity on iCloud can also use some energy on the phone. Technical changes in the mobile network and/or 3rd party wifi networks you use. There are so many factors in play.
My point was that it didn’t change for over a year, there is no way that my battery now has same capacity as 1.5 years ago.
 
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