I totalled abused the battery on the 14PM. Always running it down to 0% then fully charging all night with optimised charging off wired and wireless and it was still on 100% when sold
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iPhone 15 Models Feature New Setting to Strictly Prevent Charging Beyond 80%
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For real… like it’s a software limit on charging. This should NOT be device specific.
At this rate - and putting iPhones in a case from day one - y’all going to hand in to Apple brand new phones when you do your trade-ins 😂
You're not throwing anything away, for the periods of time that you know you won't need 100% charge you can keep your phone at a lower level to preserve the life of the battery - i.e you're gonna be at home or in the office all evening/weekend.
When you know you need the extra 20%, you unlock and charge to 100, win win.
And if you don't like it, you don't have to use it. Electric vehicles also tend to have the same feature. I'm surprised it took Apple so long to adopt it.
No point in having a ProMotion iPhone then if you are not going to use it 🤣
Who knows, it's proprietary data and nobody will do the work for Apple for free.
But depth of discharge and state of charge are very well known to negatively affect battery health.
Derating Guidelines for Lithium-Ion Batteries
Derating is widely applied to electronic components and products to ensure or extend their operational life for the targeted application. However, there are currently no derating guidelines for Li-ion batteries. This paper presents derating methodology and guidelines for Li-ion batteries using...
www.mdpi.com
Someone correct me if I’m wrong here, but it seems like:
❌ This setting is pointless if you upgrade your phone each year, even with the big hits to battery health we’ve seen with iPhone 14. By the time you’d notice the negative effects of constantly charging to 100%, you’ll be on a new phone.
✅ If you do keep your phone for a long time or hand it down to family memebers, this is a great feature, especially as people will be doing a lot more wireless charging due to features like StandBy, but you are sacrificing an immediate 20% capacity of battery life for a longer battery health.
I hope this feature makes it as easy to charge to full as the Apple Watch does. Just tap the screen when it’s charging and choose “charge to full.” It would also be nice if it uses the same smart features as the Ultra in automatically charging to 100% when you’re away from home.
❌ This setting is pointless if you upgrade your phone each year, even with the big hits to battery health we’ve seen with iPhone 14. By the time you’d notice the negative effects of constantly charging to 100%, you’ll be on a new phone.
✅ If you do keep your phone for a long time or hand it down to family memebers, this is a great feature, especially as people will be doing a lot more wireless charging due to features like StandBy, but you are sacrificing an immediate 20% capacity of battery life for a longer battery health.
I hope this feature makes it as easy to charge to full as the Apple Watch does. Just tap the screen when it’s charging and choose “charge to full.” It would also be nice if it uses the same smart features as the Ultra in automatically charging to 100% when you’re away from home.
You're confusing battery capacity with charge; this feature limits the charge to 80%, not capacity, the idea being its protects your battery ensuring you have more capacity for longer.
There's no technical reason they can't add this feature to older models which support iPhoneOS 17.
That’s just a marketing gimmick.Bet it won’t make much difference.
88 here and I go into an Apple Store and they blame it on software but won’t replace the battery. Straight up BS
This feature should be on every single device that has a lithium battery. (period) That includes airpods, iPads, Macs, and all the things made by all the other companies that are not Apple.
I usually try to limit charging to 80% on my phone and EV for day to day use. And up to 100% for times I know where I will need to use the phone more or drive more. I can charge my phone at home, office, car, etc every day so no need to stress the battery to 100%. This might help me not having to get a new battery when I keep my 15 for 4-5 years.
The quote below was taken from an e-bike battery forum. E-bikes use lithium-ion batteries too so this information is relevant to all lithium ion batteries.
Battery cycles
"You can do over 40,000 charge/discharge cycles when going from 30% to 70% only. Or over 35,000 charge/discharge cycles from 20% to 80%; 28,000 cycles from 10% to 90%; 15,000 cycles from 8% to 92%, 7,500 cylces from 6% to 94%, and the capacity reduction goes faster and faster, finally reaching 500 cycles when recharging from 0% to 100%."
Battery cycles
"You can do over 40,000 charge/discharge cycles when going from 30% to 70% only. Or over 35,000 charge/discharge cycles from 20% to 80%; 28,000 cycles from 10% to 90%; 15,000 cycles from 8% to 92%, 7,500 cylces from 6% to 94%, and the capacity reduction goes faster and faster, finally reaching 500 cycles when recharging from 0% to 100%."
People always want to complain about anything. But yea, I fully agree with you. Like 49$ for battery change is too expensive (if you plan to keep the device a few years)
Yes. Tesla recommends the same thing, 80/20, unless one really needs the full charge, which I don't on most days. I have been doing the same thing with 13 Pro Max using shortcuts. My battery health is 99%. But I'm not sure if does anything. After the 16.5.1 update, it started losing charge noticeably faster, so maybe it's just a battery lottery or iOS or both.
I personally use a program called AlDente. It works great and does what you would like. It even has a lot of configuration even in the free version
It will depend on usage, on how often you recharge, on how frequently you let the battery run to zero, and so on.
But I imagine that it could keep the capacity above 80% for maybe 50% longer, or roughly that order of magnitude. Meaning, you would trade off the capacity slowly degrading from 100% to 80% over (say) 3 years (and then further down after that) for the alternative of getting a constant 80% capacity for 4.5 years. If you generally replace the battery when the capacity drops below 80%, and you’re okay with only getting 80% from the beginning, then this means that you get 1.5 more years before having to replace the battery.
Linus and his media group are 💩 these days... but this is a good video explaining it
Basically you want to keep battery life as far away from the extremes (no power, full power) as possible... that's why Apple and practically all companies say you should store devices you wont use at 50% battery and recharge to that state every 6 months of no use.
What they need is an option to hold your battery at 80%, show 80% as 100%, and then over time as your battery depletes, increase the percentage it charges to. So, for instance, when your battery drops to 95% health/capacity, it charges to 85% to make up for that, so that your battery life is at least consistent over time. And on a phone like the iPhone Pro Max, you could do this without it impacting most people. On smaller phones, it might be nice to get a battery bump before they implement that option.
I think my DJI drone does something similar. It will fly on 0% for a while if you keep forcing the return to home activation off. It will beep at you like crazy with all kinds of warnings but you can force it for a bit. I think by default it only uses a certain percentage of the battery, and I think that's because it needs to keep the peak voltage high enough to power the motors. Kinda like how over time the iPhone can't operate at peak performance during heavy usage spikes.
So if Apple was able to put a battery in the iPhone with a higher capacity rating, they could just mark the charge level in software by default at 80% but display as 100% and then have a deep menu override setting for advanced users, pop up a message about how disabling this may reduce the iPhone battery lifespan, and then disable it for those who just want the most battery life and only use their phone for a year or two. But even for me on my 14 Pro Max, after a year, my battery health is at 88% and I use optimized charging. I imagine after two years it's not going to be great. In past years I don't remember my iPhone battery grinding down this much in a year since I'm on the iPhone Upgrade Program, and I almost exclusively use MagSafe charging which is slower than wired but also might produce more heat? Before this year it was a mix of wired and wireless, and before that it was mostly slower charging wireless 7.5W with some wired mixed in. I will need to start tracking this over time.
I think my DJI drone does something similar. It will fly on 0% for a while if you keep forcing the return to home activation off. It will beep at you like crazy with all kinds of warnings but you can force it for a bit. I think by default it only uses a certain percentage of the battery, and I think that's because it needs to keep the peak voltage high enough to power the motors. Kinda like how over time the iPhone can't operate at peak performance during heavy usage spikes.
So if Apple was able to put a battery in the iPhone with a higher capacity rating, they could just mark the charge level in software by default at 80% but display as 100% and then have a deep menu override setting for advanced users, pop up a message about how disabling this may reduce the iPhone battery lifespan, and then disable it for those who just want the most battery life and only use their phone for a year or two. But even for me on my 14 Pro Max, after a year, my battery health is at 88% and I use optimized charging. I imagine after two years it's not going to be great. In past years I don't remember my iPhone battery grinding down this much in a year since I'm on the iPhone Upgrade Program, and I almost exclusively use MagSafe charging which is slower than wired but also might produce more heat? Before this year it was a mix of wired and wireless, and before that it was mostly slower charging wireless 7.5W with some wired mixed in. I will need to start tracking this over time.
HobeSoundDarryl
macrumors G5
Conceptually, the current way to do that would be to put in a battery with 100% capacity, set the meter so it shows 100% when it is actually 80% and put however this works in the system to halt charging at (actual) 80% while showing 100%. We see 100% but behind the scenes, it's this same 80% charged (actual) store of power.
And maybe tweak that gauge with some inspiration from Spinal Tap so that a dial that normally maxes at 10 could go up to 11 and thus "be louder, because it goes to 11" by making the PRO MAX option make the above option make the (actual) 80% display as 110%, so PRO MAX users can enjoy "10% more battery."
To what you probably want though is an actual 100% capacity able to be effectively charged to 100% over and over with no consequence. For that, a new kind of battery technology will need to be discovered and invented beyond the one used now.