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denisch

macrumors newbie
Original poster
Nov 30, 2021
15
15
A friend bought his 15PM at the start of sales and it has 100% on 180 charge cycles. I decided to check it myself and was shocked: after two months it was already 99%. I charge my phone once every two days, I don’t play, I just look at social networks and rarely take photos.

How is that? Has anyone encountered the same unfair problem?
 

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BugeyeSTI

macrumors 604
Aug 19, 2017
6,870
8,727
Arizona/Illinois
A friend bought his 15PM at the start of sales and it has 100% on 180 charge cycles. I decided to check it myself and was shocked: after two months it was already 99%. I charge my phone once every two days, I don’t play, I just look at social networks and rarely take photos.

How is that? Has anyone encountered the same unfair problem?
Apple won't consider it an issue unless it goes under 80% within the warranty period
 

Contact_Feanor

macrumors regular
Jun 7, 2017
248
738
Belgium
Without knowing how you charge and how your friend charges, there's really no comparison here. If you use a higher voltage wireless charger and he uses an old 5W charger, there's the explanation. Maybe he keeps the phone cool, you keep it hotter.

Don't worry about it too much. 99% after two months is perfectly fine. Margins of error also suggest you and your friends' phone are comparable.
 

GravyonAPlane

macrumors newbie
May 6, 2015
9
3
As we all know now batteries are consumables. The iPhone batt should get 500ish cycles (to 80%charge), so if you have charged 66 times that is 13.2% of battery cycles or -2.64% battery health (assuming 80% threshold).

Moreover, lithium ion batteries always have a precipitous drop off from 100% battery health compared to a battery with many cycles. Meaning, 100 cycles for a new battery might drop the overall health to lets randomly say 95%, but the next 100 cycles might only drop it down 1 or 2% more. Each battery ages differently.

Also, if you are constantly keeping your battery at 100% or charging in high heat situations, your battery might age faster than it otherwise would.

Though at this point the iPhone is at 99%, you are good brother, don't worry just yet!
 

cogzero

macrumors member
Jan 16, 2023
30
67
Well, it seems you have a 4 month delta between Manufacture and First Use dates. This unfortunately means that some of your lithium ions have unfairly evaporated. And when they're gone, they're gone.

The best solution is to make friends with people who have inferior gear than you do. This should maximize your happiness KPI. Hope this helps.
 

McNads

macrumors newbie
Dec 30, 2023
3
7
As we all know now batteries are consumables. The iPhone batt should get 500ish cycles (to 80%charge), so if you have charged 66 times that is 13.2% of battery cycles or -2.64% battery health (assuming 80% threshold).

Moreover, lithium ion batteries always have a precipitous drop off from 100% battery health compared to a battery with many cycles. Meaning, 100 cycles for a new battery might drop the overall health to lets randomly say 95%, but the next 100 cycles might only drop it down 1 or 2% more. Each battery ages differently.

Also, if you are constantly keeping your battery at 100% or charging in high heat situations, your battery might age faster than it otherwise would.

Though at this point the iPhone is at 99%, you are good brother, don't worry just yet!
The 15 models are actually rated for 1000 cycles. Doesn’t change much overall but is a departure from the norm.
 

TechnoMonk

macrumors 68000
Oct 15, 2022
1,841
2,605
Batteries don’t age linearly, some one maybe sitting at 100% for 3 months and then battery can deteriorate faster than someone at 93%. I am at 87% after 2.5 years and one of my friend who is obsessive about charging to 80% is at 81. Too many variables to stress about batteries.
 

kinchee87

macrumors 6502
Jan 9, 2007
289
211
New Zealand
A friend bought his 15PM at the start of sales and it has 100% on 180 charge cycles. I decided to check it myself and was shocked: after two months it was already 99%. I charge my phone once every two days, I don’t play, I just look at social networks and rarely take photos.

How is that? Has anyone encountered the same unfair problem?
How is it possible that, after two months of only charging it every two days, you have already reached 66 charge cycles?
 

James6s

macrumors 6502a
Sep 22, 2015
695
1,184
Cumbria, UK
A friend bought his 15PM at the start of sales and it has 100% on 180 charge cycles. I decided to check it myself and was shocked: after two months it was already 99%. I charge my phone once every two days, I don’t play, I just look at social networks and rarely take photos.

How is that? Has anyone encountered the same unfair problem?

If you only charged it once every two days you wouldn’t have 66 cycles in 2 months? How low does the battery % get before it gets plugged in?

As others have said it’s not worth getting so stressed out over. Battery degradation isn’t linear and it depends on so many variables.

Some devices also leave the factory with a higher than rated original max battery capacity which will affect the time & cycles before the BH starts to fall.
 
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Squirrrrel

macrumors regular
Apr 24, 2024
136
226
My 15 Pro Max is at 108 cycles with 99% health and I've had mine since launch day. My 14 Pro Max was at 100% health when I sold it right before I got my 15. I don't use any optimized battery charging or 80% charging features. I always fast charge my phone every other day, since my battery lasts two days even with heavy use.
 
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denisch

macrumors newbie
Original poster
Nov 30, 2021
15
15
Если бы вы заряжали его только раз в два дня, у вас не было бы 66 циклов за 2 месяца? Какое у вас устройство? 15 вечера? Насколько разряжается заряд батареи до того, как ее подключат к сети?

Как уже говорили другие, не стоит из-за этого так переживать. Деградация батареи не является линейной и зависит от множества переменных.

Некоторые устройства также покидают завод с исходной максимальной емкостью аккумулятора, превышающей номинальную, что повлияет на время и циклы до того, как BH начнет падать.
From February 1 to May 1, 3 months have already passed, and 2. So I really charge it !on average! once every two days.
 
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denisch

macrumors newbie
Original poster
Nov 30, 2021
15
15
Without knowing how you charge and how your friend charges, there's really no comparison here. If you use a higher voltage wireless charger and he uses an old 5W charger, there's the explanation. Maybe he keeps the phone cool, you keep it hotter.

Don't worry about it too much. 99% after two months is perfectly fine. Margins of error also suggest you and your friends' phone are comparable.
We both exclusively use the original 20W unit or USB-C charging port of the MacBook Pro
 

JustAnExpat

macrumors 6502a
Nov 27, 2019
943
966
Different batteries age at different rates. Batteries do not degrade on a linear curve. As long as it's within spec (which it is), it's normal.
 
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daabido

macrumors regular
Dec 16, 2008
192
427
I also cried for my dastardly bad luck when my phone dropped from 100 to 99%. Why had the gods of technology forsaken me? Would offering up a non-Apple router as sacrifice for not buying an AirPort Extreme redeem me?

Don't sweat it. Enjoy your amazing phone. Ride that battery all the way to failure. Then get a new horse or renew your old one.
 
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