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bj097

macrumors 6502
Original poster
Dec 27, 2013
347
23
I think when you charge only to 80% the battery will drain faster and you need to charge more in a year, compared to that you charge to 100%. In both cases, the battery will degrade no matter what. Was there any actual real-life experience or computer simulation comparing both cases which reached a conclusion that we should charge between 20% to 80%, rather than 100% fully?
 

now i see it

macrumors G4
Jan 2, 2002
11,251
24,270
Time to do some reading:


C99474D5-AFF5-4A53-A015-F6FDF2840328.jpeg
 

ValhallaOutcast

macrumors regular
Sep 12, 2017
213
149
The engineers at Apple are well versed in the design of charging circuits, voltage regulation and battery health. Best to follow Apple recommendations and not out guess the charging optimizations built into the products.
agreed people who are not engineers are always that ones trying to outthink the engineers.
 

iosuser

macrumors 65816
Mar 12, 2012
1,005
753
Apple charges a reasonable $49/$69 on older/newer phones for a battery replacement. I just broke an SE1 changing the battery myself. Should've just paid Apple $49 to do it lol. I wouldn't worry too much about it *except* to not use fast charging too often.

Since my 13 Pro I've been using a 15W wireless charger which gets the phone quite hot. My battery health is at 97% after just 6mos. My son uses a 13. He's a much heavier user than I am but he only uses wired charging with a 12W iPad charger. His phone is still at 100%. My previous 12 Pro and X were using a 10W wireless charger and the battery health stayed higher for longer. I broke my 10W charger or I would've gone back to it.
 

iHorseHead

macrumors 68000
Jan 1, 2021
1,594
2,003
The engineers at Apple are well versed in the design of charging circuits, voltage regulation and battery health. Best to follow Apple recommendations and not out guess the charging optimizations built into the products.
Then why not do what MSI does? Gives you an option right from the beginning to charge it to 80%
 

Splitrail

macrumors 6502a
Dec 26, 2021
907
1,112
agreed people who are not engineers are always that ones trying to outthink the engineers.
Maybe, but corporate engineers aren't being paid to be entirely altruistic.
I seriously doubt that they are entirely responsible for determining the length of product longevity and profitability.
 

antiprotest

macrumors 601
Apr 19, 2010
4,352
16,030
I have always ignored all recommendations and charge any way I want as often and full as I want.

Just one example: There is an iPhone X in my family that gets charged multiple times a day, and rarely allowed to go below 80%.

The battery health is still 90%.

But there are people on here saying the batteries in their iPhone 12 and 13 are totally wrecked even with meticulous charging habits.

I believe them, but I don't get it.
 

LeeW

macrumors 601
Feb 5, 2017
4,342
9,446
Over here
Was there any actual real-life experience or computer simulation comparing both cases which reached a conclusion that we should charge between 20% to 80%, rather than 100% fully?

All I know is that I got the iPhone 11 on release, when was that about Sept 2019? Every day it sits on a wireless charging stand. All through COVID it never actually left it much given I was WFH and still am. So I have done nothing but left the phone to decide what it needs to do, and it will figure it out. 11% loss after 2.5 years of not caring about how it charges. I'll take it.


Screenshot 2022-06-09 at 22.57.09.jpg
 
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jav6454

macrumors Core
Nov 14, 2007
22,303
6,264
1 Geostationary Tower Plaza
I think when you charge only to 80% the battery will drain faster and you need to charge more in a year, compared to that you charge to 100%. In both cases, the battery will degrade no matter what. Was there any actual real-life experience or computer simulation comparing both cases which reached a conclusion that we should charge between 20% to 80%, rather than 100% fully?
Just use it. Don't overthink thing, let battery Optimization do its thing.
 
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Cyrus.B

macrumors newbie
Jun 17, 2022
7
0
Makes sense if you have a quite strict charging routine. (Many people do, I think.)

Makes not much sense if you charge it as needed. It would not always fully charge. But yes, the battery would last longer.
 

unrigestered

Suspended
Jun 17, 2022
879
840
Most of the time I’m going 100% to <10% (sometimes just <20%) and back to 100%

But I’m trying to keep the battery most of the time between 20-80% and above and below that only for a short while if possible
 

reppans

macrumors 6502
Dec 2, 2006
323
190
I got 6.5/7.5 yrs from my iPhone5/iPad2 combo charging ~80-20 using a light timer. My Aug ‘19 XR running a custom optimization (cycling even lower) is arguably still worthy of Apple SOT spec.

A light timer only cost 5sec/day to ‘manage’ and with today’s shortcut automations, smartplugs, and USB dongle options, it’s now zero effort to manage and less hassle than a Apple battery swap.
 
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