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"Lets throttle the CPU to preserve the ultra-thin, bare minimum, non user replaceable, battery!"
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"We need to make the batteries thinner! Someone get to work on a better CPU throttling algorithm!"
 
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So there you have it!

When users suspect that Apple purposely degrades the performance of their current iPhone when a new one comes out, Apple’s denial is technically true. Nothing’s wrong with your iPhone or the iOS update... it’s your battery that’s doing the degradation.
 
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I’ve had a lot of problems with my 6s since upgrading to iOS 11. Battery drains very quickly then stays at 1% for hours. Touch ID is very hit and miss. Screen scrolling often jerky. Touch screen has become inconsistent.
 
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My iPhone 6 was getting pretty laggy so upgraded to a X a couple of weeks ago and gave my 6 to my daughter. Just ran Geekbench on the 6 and it didn't score high. Maybe I just needed to get a new battery.
Screen Shot 2017-12-11 at 19.55.11.png

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Interesting, I seem to have the same issue: 89% battery: single core: 1292 multicore: 2232. Nice iphone 4 I have here that's suppose to be a 6s.
 
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3rd point, Apple should have just recalled those batteries.
Yeah right and risk their image as a company that only sells flawless phones? haha. Why should they anyways, they'll just sweep it under the rug by making old phones totally useless and meanwhile earn more money when people decide to buy new models, because the old ones are obviously obsolete and cannot run new iOS properly lol. I really look forward to their response on this matter, i'm quite curious what kind of stories they'll mastermind about this weasel move.
 
Don't know why this is such a surprise. You either get high quality or high profit margin but not both. Now you know why Apple's profit margin is ridiculously high.

$40 Moto E4 is also confirmation since it uses the same Amperex battery manufacture as Apple but Moto at least made it removable and user replaceable.

IMG_20171211_122410.jpg
 
Not a news, from the first day I got my hands on the X I noticed when the phone only has a few percents left, that few percents lasts longer than any other percentage during battery is not low, and you see all that frame rate drop without enabling battery mode.
 
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Since the shutdowns mostly only happened when it was both cold and the charge level below about 40%, Apple only needed to slow the phone down under those conditions. If the phone asked you whether you want a 50% chance of the phone shutting down or the phone continuing to work but more slowly, I think most people would choose the latter option.
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I was in the same boat but shutdowns also required cold temperature. The colder the phone got, the earlier the shutdowns would happen. At room temperature, shutdowns only happened below a 10% charge level. Holding the phone long enough to get close to ambient temperature, shutdowns could happen at up to 40% when the temperatures were about freezing.

iOS 10.2 significantly improved things for me. In cold conditions shutdowns only happened below about 15%.

Those symptoms are all from lipo battery characteristics. As they age, their total capacity drops and also their "C" rating also drops. The C rating is the amount of current they can supply without the voltage taking a dump from drawing too much current. So your cold battery can't keep the current (amperage) required to keeping the CPU fed without the voltage dropping so low it makes your iphone reboot.
So by heavily throttling the phones, Apple is able to make these "old batteries" last longer by reducing the current required in order to prevent the voltage dropping, triggering a reset.

The real question is: Is this only seen in the 6S series? Do other iphones/ipads also do this as the battery wears out? If only the 6S is doing this, then Apple underspecced the 6S batteries, meaning either for weight (higher C rated batteries weigh more and tend to be thicker another lower rated battery at the same capacity which leads us to) size, or cost issues. In other words, the battery can only meet the needs of the CPU running full throttle when new. You would spec a higher rated battery with plenty of margin in order for the battery to keep up with the power demands as it ages. (Which would either require a more expensive or thicker/heavier battery)
 
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Those symptoms are all from lipo battery characteristics. As they age, their total capacity drops and also their "C" rating also drops. The C rating is the amount of current they can supply without the voltage taking a dump from drawing too much current. So your cold battery can't keep the current (amperage) required to keeping the CPU fed without the voltage dropping so low it makes your iphone reboot.
So by heavily throttling the phones, Apple is able to make these "old batteries" last longer by reducing the current required in order to prevent the voltage dropping, triggering a reset.

Question is though - is one year really old for a battery?
 
Sweet baby Jesus...
CPU frequency is 911 MHz
Single core score 1294
Multi core score 2441

76% battery capacity.

Yep, time to replace that batt!
 
Question is though - is one year really old for a battery?
It isn't IMHO

To make this simpler, let's say the 6S needs 3 amps of current to feed the CPU at full speed. (These numbers are just made up) Typically, you would want a battery that can put out at least 5-6 amps when new build a nice margin of safety. Let's say Apple decided to use only a 3 amp rated battery due to size, cost, weight concerns, as the battery wears out, it's not going to be put out the 3 amps anymore without a significant voltage drop as the battery's charge level goes down or the temp goes down etc.....
 
It isn't IMHO

To make this simpler, let's say the 6S needs 3 amps of current to feed the CPU at full speed. (These numbers are just made up) Typically, you would want a battery that can put out at least 5-6 amps when new build a nice margin of safety. Let's say Apple decided to use only a 3 amp rated battery due to size, cost, weight concerns, as the battery wears out, it's not going to be put out the 3 amps anymore without a significant voltage drop as the battery's charge level goes down or the temp goes down etc.....


yeah, I totally get your argument. It makes sense that an old battery just dies quicker and I can even understand how they would try to save battery time by reducing processing power. What I fail to understand though is how so many people, including me, have bought a new phone a year ago and end up with not even 50% of the processing power... This can't be right! (And I even had mine replaced because of battery problems)
 
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yeah, I totally get your argument. It makes sense that an old battery just dies quicker and I can even understand how they would try to save battery time by reducing processing power. What I fail to understand though is how so many people, including me, have bought a new phone a year ago and end up with not even 50% of the processing power... This can't be right! (And I even had mine replaced because of battery problems)

Exactly, either the batteries are underspec OR Apple's supplier didn't meet the specs.
Either case, this is deceptive in my opinion as people are getting slower than iphone 6 speeds due to the throttling. As a corporation who's sole responsibility is only to the shareholders, throttling the cpu to keep the underspec batteries working in order to save millions instead of recalling all the batteries seems to be par for the course.
 
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