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I could have sworn with iOS 17 and the 15 pro, you could enable ‘Optimized Charging’ when setting the charge limit to 80% etc. With iOS 18 and the 16 pro, you can only enable optimized charging if the limit is set the the default 100%.
Optimized Charging fast charges the watch to 80% and holds it there until shortly before it predicts you're going to use it, then tops it off to 100%. If your charge limit is set at 80%, Optimized Charging is redundant since it's going to stop at 80% anyway.
 
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Optimized Charging fast charges the watch to 80% and holds it there until shortly before it predicts you're going to use it, then tops it off to 100%. If your charge limit is set at 80%, Optimized Charging is redundant since it's going to stop at 80% anyway.
Maybe someone with a 15 pro still on iOS 17 can chime in and tell me if my memory is accurate or not.

I don’t see it as redundant if one has done nothing but changed the charging limit. Optimized Charging can still operate as intended with a new limit set. With iOS 18, I chose to keep ‘Optimized Charing’ enabled. I am not really worried about the battery as many here often get. If for some reason I have the phone for more than 2 years and in need of a battery, I have no problems paying Apple for the service.
 
Optimized Charging fast charges the watch to 80% and holds it there until shortly before it predicts you're going to use it, then tops it off to 100%. If your charge limit is set at 80%, Optimized Charging is redundant since it's going to stop at 80% anyway.
This never worked for me since iPhone 13!? I turned if off/on and I checked the GPS settings....etc all good but it does for my watch and my Airpods.
 
Maybe someone with a 15 pro still on iOS 17 can chime in and tell me if my memory is accurate or not.

I don’t see it as redundant if one has done nothing but changed the charging limit. Optimized Charging can still operate as intended with a new limit set. With iOS 18, I chose to keep ‘Optimized Charing’ enabled. I am not really worried about the battery as many here often get. If for some reason I have the phone for more than 2 years and in need of a battery, I have no problems paying Apple for the service.
I'm the same. I'm not going to obsess over my battery or make it a contest to see how long I can keep the battery health at 100%. I charge it to 100%, use it all day, and charge it to 100% again the next night using Optimized Charging and a MagSafe charger. My 13 Pro was at 79% battery health after 3 years of hard use, if I had kept it I would've replaced the battery and kept on trucking. I don't have any problem paying Apple for a new battery every 3 years if I decide I'm going to hold on to the phone longer than that (which I've never done yet, going clear back to the iPhone 3G).
 
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I've charged my last 5 phones (upgrade annually) to 100% and at the end of the year one was at 97% and the other four were at 100%. I'm not a heavy user and I question the accuracy of those numbers, but I guess most of us here are going with Apple's reported percentage.
 
Well my data point is pretty interesting.

iPhone 15 Pro Max
247 cycles
100% battery health

I have shortcut automations that keep my phone between 50 to 55 percent via a smart plug. Maybe it drops to 30 percent at most if I’m away from a desk, but I’m mostly next to a charger all day. On the weekends I let the phone charge to 80 percent and since there’s a charger in the car I may bounce back up to that a couple of times during the day.

Just checked CoconutBattery and it says I’m still at 103% of design capacity!
Theoretically you could probably last a good 10 years doing it this way! LOL
 
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How are you doing this? I don't see that option on my M2 MBA battery settings on Sequoia.
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My MacBooks are also plugged all the time and just do it by themselves to preserve the battery
M2 and M3 MBP
 
IDK, I use optimized charging on my M2 and it still usually charges to 100% when plugged in at my kitchen table. Thing is, I want 100% (or at least 90%) sometimes on weekends when I go mobile more often. I'd MUCH prefer to just be able to set a hard limit and toggle it off when I am preparing to go mobile.

View attachment 2430399

My MacBooks are also plugged all the time and just do it by themselves to preserve the battery
M2 and M3 MBP
 
I never believe on these optimal charging thing. Nowadays the devices are made to stop charging when reached 100% and will only recharge if needed. Always disabled optimal charging and plugged my phone every night. My 13 PM have 89% health after 3 years.

I think batteries are just a lottery. You can babysit all year and have a bad health after a year and you can charge whatever you want and still have good results.
 
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