I have my iPhone 15 charging optimization set to 80% limit. Today, I take my iPhone off the charger and the battery level reads 86%. Does anybody know why this would occur, and what could be done to prevent this from happening again? Thanks in advance for your response.
iPhone 15 Plus
From the Apple article:
About 80% Limit with iPhone 15 models
With iPhone 15 models, you can choose between Optimized Battery Charging, 80% Limit, and None.
When you choose 80% Limit, your iPhone will charge up to about 80 percent and then stop charging. If the battery charge level gets down to 75 percent, charging will resume until your battery charge level reaches about 80 percent again.
With 80% Limit enabled, your iPhone will occasionally charge to 100 percent to maintain accurate battery state-of-charge estimates.
This implies that it is around 80% not necessarily exactly 80% so it may still be working as intended. You could report it to Apple if you think it is a bug and not functioning correctly though
About Optimized Battery Charging on your iPhone - Apple Support
I have had the same issue. It took me at least 10 full charges to 100% before the iphone started charging to 80% - all in the 80% limit option. So, enable this option (if you hadn’t) and keep charging your phone. Be patiënt. After (much) charge cycles it will finally start charging to 80%.
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** işlem sırasında telefondaki bütün bilgiler silineceği için mutlaka yedek almanızı tavsiye ederim.
Let it completely charge up all the way to 100%. Then the next time you charge it, it should then only reach 80%.
This seems to have been fixed on my 15 Pro max in the software update of iOS 17.4.
Your iPhone will charge to within a few percentage points of your chosen limit.
Please this phone update
harmen369 wrote:
Updated to 17.1.1 but the bug still exists. Even with 80%-limit on the battery will charge to 100% --every time--. Can anyone report this to Apple, or know any solution?
You can and should report it to Apple.
Exactly!
I can confirm that, and I observed that when charging to 80% is enabled it is “calibrating” itself once ina month (or two sometimes) but it is not happening that often now. Maybe in the beginning it did 100 few times ina a row but now it works in “occasionally mode” and usually it stops at 80%.
so in my opinion everything is fine and if you faced issue that the phone charged itself to 100 few times in a row - don’t worry, it will behave normally just give it some time to finish all those calibrations etc.
Got the latest version as I wrote so that’s not the case…but the option that it might charge itself for calibration makes sens.
you have any article about it? Because I did not thought about it but it’s quite interesting.
I have the same problem, also with iOS 17.1, on my iPhone 15 Plus. Every time the iPhone charges to 100%, even on the "80% Limit". This must be a bug.
FYI: I use the official Apple cable and charger. Please Apple fix this.
For me - after charging the battery few times in a row to 100 it started to do 80 on each charge. I thing that there were maybe 2 times when it did 100 again but I can tell that from over a month it always end up with 80% when I leave the phone. I’m using original charger and high quality usb-c cable (not the original one) and I don’t have any problems with overcharging at this moment.
I guess that the latest update 17.2 fixed something anyway, but for me on the previous update charging was already fine.
It’s crazy how this is STILL an issue even with the latest 17.2.1 update. My phone charges intermediately since brand new then replaced it with another brand new one that did the same exact thing. Refused a refund, never charged to 100% even with optimization turned off. Only seems to happen with the iPhone 15 Plus I’ve been reading
Happened the same thing for me today for the first time. Charged to 88%, restarted it, and the battery was 92%. (I have iPhone 15pro max). Could it be, that charging more the 80% is because of upcoming update? After I saw 92% I checked if update is available. And it was.
This battery problem is hilarious. At first when i bought the phone it was all good but then out of nowhere with 80% optimisation is on it charged upto 90%+. I wasn’t worried about it much and also it did not happened again till today it charged upto 83%. With new update, comes great bugs. (Please fix it soon).
tldr : the 6% excess in charges is needed for the battery to complete 1 charging cycle.
I might explain this badly but hope you can understand. To avoid getting your battery being charged more than 80%, best tips is to always start charging at 20%. You can try this and confirm later.
The logic behind this is charge limit refer on the charge cycle. Battery being charged from 0%- 100% in one charging session considered to be charged by 1 cycle. If you charge from 20% and the battery limits the charge at 80%, your charge cycle is incomplete. In charging electronics battery terms, incomplete charging cycle is good while complete charging cycle is bad.
iPhone 15 charging optimization limit exceeds 80%
