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This makes almost no sense, but let me present a reason why some people might do this.

They live/work where there are plenty of chargers, MagSafe or otherwise, so battery anxiety is not an issue.

However, when it comes time to resell, or pass down the device to others, having near perfect battery health helps maintain value. Or they simply want to use their devices even longer (ie. +1-2yrs beyond typical 2-3).

With the CPU power being as high as it is, the battery biggest deteriorating factor.
 
No plans for the 15, but I wouldn’t use it (as a battery hobbyist) - it’s too basic and doesn’t do what I want it to. I’ll stick with a smartplug + shortcut automation, or Chargie USB dongle, for user-defined control over both peak charge AND charge window. Works for me - 92% batt health after 4yrs of single plug-in/day.

Capacity limitation is actually a ‘feature’ for me - I need the ‘parental control.’
 
No. I do not have the courage to limit my charge to 80%. I am worried free of charging my devices. Full charge all time.
 
I activated it on my 15PM.

My 13PM was always charged with 5W Apple Charger at night. Optimized battery on. Was at 90% health.

I’ll try to preserve the 15PM battery more.
 
I don’t understand the point of this feature. You limit your brand new phone at 80% battery capacity to avoid it dropping to 80% capacity in 2 years???
 
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No I refuse to hamstring my phone and force myself to get a charger sooner. I have apple care and usually get rid of my phones before it’s an issue anyway.
 
For me, no. I use optimized charging and have never had any issues with undue battery degradation. Other thing is I usually don't keep my phone long enough for it to matter :)
 
I do not believe charging up to 80% would meaningfully be that impactful.

I 5-12W slow charge overnight without case and 30W fast charge in the car with case for 0-50% battery within 30 mins.

If I was married with 4 kids this is what I could do when handing down devices. Replace batteries every 3 years.

Family Replacement Cycle3Y6Y9Y
2 parents2023 iPhone 15 Pro Max2023 iPhone 15 Pro Max2023 iPhone 15 Pro Max
1st 2 kids phones2022 iPhone 14 Pro Max2021 iPhone 13 Pro Max2020 iPhone 12 Pro Max
Last 2 kids phones2021 iPhone 13 Pro Max2019 iPhone 11 Pro Max2017 iPhone 8 Plus
1st 2 kids sold phones2020 iPhone 12 Pro Max2017 iPhone 8 Plus2014 iPhone 6 Plus
Last 2 kids sold phones2019 iPhone 11 Pro Max2015 iPhone 6s Plus2011 iPhone 4s

Final iOS Security Update occurs on month 100 (8.3 years) or 112 (9.3 years)
I am impressed with your chart.
 
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I am impressed with your chart.
I aspire to impress.

Its difficult to describe it in a sentence much less paragraph form. So a chart or a bullet point would save everyone's time.

Going back to the table I was figuring out how I'd get the latest and greatest while being able to lengthen the useful life of outdated hardware to up to 6 or 9 years if I was a family man.

I could do this with Macs & iPads as well.

1st 2 years with parents + next 4 years with kids = 6 years total

Or

1st 3 years with parents + next 6 years with kids = 9 years total

Final macOS Security Update occurs on year 9 point something. So any Mac after that would be what I'd replace it with.

Hand me down the device to a needy relative or sell it for junk value of say $100?
 
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I’m going to have to test it and see how well the battery life is on my 15 Pro Max to see if the 80% limit is feasible for me

I remember when my 13 Pro Max was new, I would end the day with 40% battery (and that was with heavy use). Therefore if I had the 80% limiting feature back then, i would be perfectly happy.

My parents on the other hand? Yeah I think i’m going to limit them to 80%. They barely use their phones so a single charge lasts them 3-4 days and often times (when they do charge) the phone is just laying on the wireless charger for hours. 80% is perfect for them.
 
All the comments about not understanding the feature…. It’s for people who have their phone constantly plugged in throughout the day. I used to have an hour long commute everyday plus if I was in the field I was always in the car using wired CarPlay. I rarely even used 50% battery. Doing this will degrade battery life over time. That’s the purpose of the 80% charge limit. And it will still periodically fully charge to maintain the battery
 
I doubt I will use it regularly because I only keep my phones for a year anyway, but I tried it last night and it worked as expected — woke up at 80% this morning.

I’d consider using 80% limit on normal days and fully charging for travel days, camping, etc. but this would be much easier with a control center button or shortcut to enable/disable it, and I don’t think there is such a thing.
 
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Heck no.

My iPhone 14 Pro that I got on launch day last year was always charged wirelessly all day at work, set on my nightstand at night, and is still showing 100% battery health.

Best battery life I’ve ever had in an iPhone. Hoping that my new iPhone 15 Pro is as good or better 👍🏻
 
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No. Use the phone and charge it when necessary whether its during the day or overnight. My battery health on my 11 Pro is at 94% with optimized charging always off and i plan on doing the same for my iPhone 15 Pro.

In my opinion if you constantly have it plugged in (if youre a driver for Uber or similar job) you’d use this option..think of laptops.
 
I think that if I had a specific use case that concerned me, like gaming (I don't on phones), or a long drive with navigation on a charger (which does occasionally happen), I'd turn the 80% limit on. For day-to-day use, I would be inclined to use optimized charging, as that's closer to my normal usage pattern.

What I'd like to find is if there is a prefs: URL for the nested Battery -> Battery Health & Charging -> Charging Optimization page, and then set a shortcut for it. The shortcuts lists I've seen so far will get me to the Battery Health page, but I'd like to go one deeper and see if I can automate it.
 
I've enabled it. On my 12 Pro Max i had a shortcut to notify me when it charged to 80%. So I'm happy that this is built in now. Of course if I ever need more than 80% charge then I'll charge it more but if I don't think I'll need it then I'll stop charging at 80%. Early on with the 12 Pro Max i didn't really need to go beyond 80% but the last year I have found my self charging it up more and carrying a portable charger with me.

I don't need to do it but I want to. Since I have AppleCare my battery is covered but I like to do anything possible to take the best care of my products. I'm not going to change how I use my phone. Again... if I need to charge to 81-100% then I will. If I want to play some intensive games (not that I do play games much) then I will. I just don't see the need to charge up more than I need to.
 
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My 2021 iPhone 13 Pro Max 128GB that I got at local launch just turned 97% last week.

I just use it for work and not to recreational use.
Yea use make a big diff. Using mine for maps and playing spotify (has to be plugged into the car to do carplay) hits it hard. I'm hoping the thermals of the 15pro are better than my 13 mini.
 
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This makes almost no sense, but let me present a reason why some people might do this.

They live/work where there are plenty of chargers, MagSafe or otherwise, so battery anxiety is not an issue.

However, when it comes time to resell, or pass down the device to others, having near perfect battery health helps maintain value. Or they simply want to use their devices even longer (ie. +1-2yrs beyond typical 2-3).

With the CPU power being as high as it is, the battery biggest deteriorating factor.
If resell value is concern why not change battery to a new one before reselling. Not normal to get a smarthphone then worry every day about battery imho.

How much it even affects resell value anyway? Like $100 (same as replacing battery). For that to stress battery every day for 1+ years. :rolleyes:

Edit. I might add that I have iPhone XR bought in 2019. I never worried about charging. I charge how I charge don’t care. Still on original battery 85% capasity. Lasts all day still (for my use).
 
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I am among the - apparently small - minority that aims to maximise battery life span. I have maintained the 80% limit on my iPhone 8plus, 11 and now 14PM. The charger is in a smart plug and once the iPhone gets charged to 80% a shortcut switched off the smart plug. No stress, it’s a simple set-and-forget.
If I need 100% next day I switch on a second shortcut to switch the charger on again one hour before my morning alarm and I have my phone at 100%.

My 8plus I bought in 2017, passed it on to my daughter in 2019 and got her a smart plug and she’s been using 80% charging all the time. The 8 plus battery health is still almost 80% after 6 years. Same with the iPhone 11 that went to another daughter.

Even if you only keep your phone 1-3 years, by using the 80% charging method you can help saving battery health and cut down the mining of valuable earthly resources, ultimately help saving the environment.

I notice that for most here, money is the main decision driver. But our iPhone usage contributes to massive environmental waste. Yes I’m part of that, but I try my best to squeeze the most out of my devices.
 
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