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If you don't want to read, think of it this way: When parking your car do you pull in at 100mph or 10mph and how close to the other cars or fence do you get? And Why? Basically the same principles at work, the electrons/ions are the cars and the battery is where they park.

your llnk is interesting but says nothing of wireless charging.
 
So the payoff for years of increasing battery sizes is we now use only 80% of it? :rolleyes: Question though. Is it more harmful to be going over 80% than to frequently drop below 5%, which becomes more likely if you were already using most of your capacity before?
 
I don't think there's much difference between those two. It's mostly going above 80% AND going below 20% what's bad. But hey, if you phone's at 20% and you need it, just use it. Same with charging to 100%. If you think you'll be out all day without charging options just charge it to 100% It's still a device to use.
 
I have a better idea Apple. How about you take some of that $25B+/year in R&D money and actually do something significant with it like coming up with better battery tech instead of expecting customers to utilize only 4/5ths of the battery potential of their brand new iPhone.
Do you complain the roads are limited to 60mph when your speedometer goes to 140mph?
 
Given the number of people populating this forum who have demonstrated severe mental illness around vanishingly small details concerning their Apple products in general over the years, this ridiculous reaction to a well known and user selectable method for preventing battery degradation- same as in any good electric car- was entirely predictable.

Don‘t like it? Don’t use it.
 
If you use the same amount of energy in your phone everyday. Is it then better to charge it multiple small time a day (e.g to 50%), or just charge it to max?
 
Maybe Apple could deign provide some rationale behind this?

why 80 % ? is it to placate the 20/80 conspiracy theorists ? are they right?

why 80 ? why not 90 or 95 ?


And other questions?

What is the variability between batteries? are they all created equal?

With hundred millions of iPhones of each generation in the wild, sending stats to Apple, can't they know the impact of different charging and use behavior? of magsafe vs wired? slow charging vs fast charging?

What even is the point of optimized charging? why adding the 80% limit? why now?

Battery chemistry is well understood. Calling it a conspiracy shows your lack of knowledge, unless you know something that none of the thousands of educated scientists who dedicate their lives to studying chemistry know. If that’s the case, care to share?

Why 80%? Because it’s the sweet spot between capacity and longevity. Degradation at higher cell voltages is exponential. Apple doesn’t like to give people options.

All of this information is readily available from free scientific resources. Perhaps you should do 15 seconds of research before posting silly comments on the internet.
 
If you use the same amount of energy in your phone everyday. Is it then better to charge it multiple small time a day (e.g to 50%), or just charge it to max?
Small charges are better than big ones. The important thing is to stay away from > 80% and < 20%. The most important is avoiding heat.
When at home I keep mine between 65% and 75%. With this new option I wouldn't bother anymore and just leave it on the charger at 80%.
 
So the payoff for years of increasing battery sizes is we now use only 80% of it? :rolleyes: Question though. Is it more harmful to be going over 80% than to frequently drop below 5%, which becomes more likely if you were already using most of your capacity before?
Good question. But here it’s min 60% mostly about 70% when I charge my phone in the evening. So it would be 40% to 50% with this new feature. And when e.g. going for a multi day hike I would charge it to 100%.
 
Nothing to do with wireless charging. My wife and I exclusively wirelessly charge. I’m down to 86% on my launch day 14 Pro Max, and she’s on 98% on her launch day 14 Pro. Something about some of these batteries is just bunk.
Wireless charging generates more heat than wired and heat is bad for batteries.
 
Are the production iPhones 15 on iOS 17 or 17.0.1 as was sometimes the case? Perhaps this is coming to older phones in an iOS update.
 
This setting should be third party app only. Who sells a "better battery life" with 20% stripped off?
 
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I also don’t get the point of artificially limiting yourself to 80% from day 1 instead of in 2 years when your phone is down to that. At least you got 2 years of 80%-100% usage. The only time this makes any sense if you’re the type that flips your phone to sell for a new one. But in reality, how many people actually do that?
It's about damage. Why are vehicles with 140mph speedometer limited to 60mph? Less damage to the engine, less damage to the tires, less damage to the roads, less damage to other vehicles. Both are optional, you can drive and charge however you want, you just will suffer the consequences good or bad.
 
How long before non-iPhone 15 users get together and file a class action lawsuit against Apple for allowing older iPhone batteries to degrade faster?

#iPhoneBatteryGate2

🤣
My lawyer tells me paperwork should be filed within 48 hours 😝
 
All, think about how long you’ll keep your phone and if it’s worth it. It takes at least a good couple of years to wear your battery down to 80% by charging all the time.

You could spend the whole of those 2 years with your battery capacity artificially limited to 80% with this setting. Assuming, generously, that your battery gets absolutely no wear with this setting on.

Or, turn it off and experience 100% capacity for the first 6 months, then, as the wear sets in, 95% capacity for the next 6 months, and so on until you end up with the capacity at 80% after 2 years. If you get a new phone at this point, you could back at the last 2 years and you would have got more battery life from your phone than if you had artificially limited it.
 
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