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I can't imagine 18.4 will be much more taxing on any iPhone battery as compared to 18.3, especially with all the planned AI features delayed. Really shouldn't see much of an impact at all, as the features that 18.4 does bring are very minor. Now IOS 19 is a different story. That will feature a more thorough update to IOS and I am sure some older iPhones will see some small drop in battery life.
 
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I have the 13 Mini. No difference noted so far on 18.4. The biggest improvement I saw was after I had Apple replace the battery once it got down to around 80% health. It's been over a year since then, and it's still at 100% health despite daily use and charging overnight. The Mini will never have the greatest battery life due to its size, but if it's important to you to get as much from it as you can, get a new (OEM) battery once it's deteriorated. And use a cable to charge it, not induction. Heat kills batteries, and the small cell in the Mini heats up especially quickly with magnetic chargers.
 
I got my new 512GB mini few days ago with 100% battery health. Now on 18.3.2, still hesitate to update to 18.4, but if you say it is equal to 18.3.2 then I may pull the trigger
 
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Better safe than sorry with all the quashed bugs, I'd say. Battery life isn't good, anyways. But, on topic, 18.4 isn't much worse than previous OS's. I have a 13 mini.
 
18 has been so much worse for me than 17 in general. I was managing almost 3 days on a charge (not a heavy user and turning off battery eating features) on 17. Battery life dropped abruptly with 18, and I’m now charging it pretty much daily. And battery health hasn’t decreased at all.

Anyway, I don’t expect 18.2 vs 18.4 to be significantly different unless 18.4 turns on power hungry features by default or re-enables settings you might have previously disabled (recurring upgrade headache — you can do better, Apple!) 19, on the other hand…
 
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Mine is new mini 512GB with 100% battery health
You should be fine unless it’s wide spread issue. Problem is battery gets worse with age and people tend to blame it on later updates. I keep my phones 6-7 years, iPhone 7 Plus after 3.5 years had worse battery, and I could have blamed it on OS. Once I replaced the battery it was good again. Of course iOS 18 will look much worse than 17 as battery is year older.
 
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Hi guys, I’m currently running 18.3.2 on my 13 mini, would you recommend updating to 18.4?
Any of you with Mini, how it behaves on 18.4?
Not sure about other people’s iPhones right now but my 15 PM is currently showing this after updating to 18.4, so maybe a little early to speak to battery life…
IMG_8184.jpeg
 
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You should be fine unless it’s wide spread issue. Problem is battery gets worse with age and people tend to blame it on later updates. I keep my phones 6-7 years, iPhone 7 Plus after 3.5 years had worse battery, and I could have blamed it OS. Once I replaced the battery it was good again. Of course iOS 18 will look much worse than 17 as battery is year older.
Not true. I’ve used original iOS versions for years on end and battery life never worsens. I’ve tested two same-model iPhones. One updated with good health and one not updated with poor health. The original version iPhone is infinitely better.

Battery health is irrelevant if the device isn’t updated. Battery life is obliterated by iOS updates.

We can discuss compatibility if you stay behind. We can discuss whether the device isn’t really useful for you if not updated. We can discuss Safari breaking. But not battery life.

Yours is a forever-perpetual myth perpetuated by serial updaters who don’t know any better and tolerate garbage.

Try staying behind once and let me know.
 
Must be something out of this world if the battery never deteriorates.
Have you tried it? Battery health deteriorates, but it has no impact on battery life because Apple is THAT good with original iOS versions optimization.

One of the things I’m grateful to Apple for is that even though there was a period in which standby time was poor on original iOS versions, and in spite of the fact that Apple keeps adding features to software, they’ve managed to take advantage of bigger iPhone batteries and have channeled those improvements into better battery life.

iPads have had smaller batteries, but battery life (at least for light to moderate use) on original iOS versions of newer iPads is better than ever.

I’ll praise Apple’s software when it deserves it. But they keep destroying devices if you update far enough. By now people should know and they shouldn’t expect otherwise.

I find it very funny now when people update and then complain. If you’ve been using devices for years you should know better.

Just like you should know better and place the blame correctly (on updates) rather than spewing the same decade old myth (battery health).
 
Have you tried it? Battery health deteriorates, but it has no impact on battery life because Apple is THAT good with original iOS versions optimization.

One of the things I’m grateful to Apple for is that even though there was a period in which standby time was poor on original iOS versions, and in spite of the fact that Apple keeps adding features to software, they’ve managed to take advantage of bigger iPhone batteries and have channeled those improvements into better battery life.

iPads have had smaller batteries, but battery life (at least for light to moderate use) on original iOS versions of newer iPads is better than ever.

I’ll praise Apple’s software when it deserves it. But they keep destroying devices if you update far enough. By now people should know and they shouldn’t expect otherwise.

I find it very funny now when people update and then complain. If you’ve been using devices for years you should know better.

Just like you should know better and place the blame correctly (on updates) rather than spewing the same decade old myth (battery health).
It’s about physics, nothing to do with Apple. Batteries deteriorate with time. Be it in the phones or cars or what ever device.
 
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