I'm not going to charge my battery at all. That will conserve its usability. Thanks APPLE. 

I guess my Chargies just became obsolete! They lasted me all of two months lol.
All of the iPhone 15 and iPhone 15 Pro models feature a new battery health setting that prevents the devices from charging beyond 80% at all times when enabled, as confirmed by The Verge's Allison Johnson during a Q&A session today.
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The new setting is separate from the pre-existing Optimized Battery Charging feature on iPhones, which intelligently delays charging past 80% until a more appropriate time by learning the device's daily charging routine. When the 80% hard limit is enabled, the iPhone will never charge past that point whatsoever.
On all iPhone 15 models, there are three options under Settings → Battery → Battery Health & Charging → Charging Optimization:
As with Optimized Battery Charging, the 80% hard limit can improve an iPhone battery's lifespan by reducing the time that the battery is fully charged.
- Optimized Battery Charging
- 80% Limit
- None
The new setting was previously discovered in iOS 17 code by software researcher Steve Moser.
Apple says all of the iPhone 15 models have the same battery life as iPhone 14 models. The devices launch this Friday.
Article Link: iPhone 15 Models Feature New Setting to Strictly Prevent Charging Beyond 80%
A fair bit a single charge use to last a day to a day and a halfI usually sell my iPhone on eBay each year and how long do you use your phone each day? I sold my 14 pro with 100% battery health.
Mine is at 85% and I usually have to charge it by 8pm. I love this setting becoming available, but if Apple cared at all about its customers it would have made this a software feature that works on any iPhone. There truly can’t be an iPhone with iOS17 support that couldn’t handle this update and improve the iPhone’s battery substantially. If Apple cares about the environment so much, this is probably where it could save more than all its solar farms and carbon neutral payments to offset this BS from whatever.I appreciate this for people who have issues (or are worried). I know that everyone's mileage is different. For me, on my launch day 14 Pro Max is at 100% Health with daily overnight MagSafe charging, daily plug-in CarPlay to/from work. Basically- just use it. Will I use this? Perhaps...But nice knowing its there.
Yes. Tesla recommends the same thing, 80/20, unless one really needs the full charge, which I don't on most days. I have been doing the same thing with 13 Pro Max using shortcuts. My battery health is 99%. But I'm not sure if does anything. After the 16.5.1 update, it started losing charge noticeably faster, so maybe it's just a battery lottery or iOS or both.
Well obviously this feature isn’t intended for someone like you who frequently upgrades their phone. As for someone like me who only upgrades every 4 years, I sure do welcome this feature. My 11PM is now struggling to hold charge with its battery health at 81%.Nope. Charge to full, smash the battery, MagSafe in the car, upgrade after a year. It made no difference on the 13 pro. The 14 pro just had a **** battery.
This feature should be on every single device that has a lithium battery. (period) That includes airpods, iPads, Macs, and all the things made by all the other companies that are not Apple.
So you have to make the decision to turn it off when charging before you head out, and guess where you’d be doing this most time? Home! So keep the damn thing off.
Laptops, especially gaming laptops, run warm for long periods. So these settings can help.The Windows laptops I’ve bought over the last 5 years all have a battery saver feature that keeps the battery at 60-80% max charge. The ThinkPads even let you fine tune the charge levels.
You forgot, "....for the user's own good."How long before these headlines and online comments? "Apple intentionally limits battery capacity!"![]()
On all iPhone 15 models, there are three options under Settings → Battery → Battery Health & Charging → Charging Optimization:
- Optimized Battery Charging
- 80% Limit
- None
Then why 80% and not 95%?Extreme states of charge like 100% and 0% negatively affect battery health because the materials expand and contract.