Key Takeaways
- Absolutely charging your iPhone consistently can chemically age the battery, decreasing its life.
- iOS 18 gives management over charging limits from 80-100% for iPhone 15/16 fashions.
- Optimized battery charging function learns your habits to extend battery life.
It is a merciless irony that the battery in your iPhone would not like being absolutely charged. The longer your iPhone is absolutely charged, the shorter the lifetime of your battery. For those who consistently cost your iPhone as much as 100%, it will possibly trigger your battery to chemically age, which implies it will not be capable to maintain as a lot cost. Thanks, chemistry.
Since iOS 13, your iPhone has had an optimized battery charging function that is meant to cut back the damage and tear in your battery by pausing your charging at 80% earlier than topping as much as 100% on the final minute. With the iPhone 15, Apple launched the flexibility to restrict charging to 80% in order that your iPhone (virtually) by no means prices to 100% in any respect.
And now, in iOS 18, Apple is giving us much more management, with a variety of charging limits from 80 to 100%. The function is barely out there on iPhone 15 or iPhone 16 models, nevertheless. Listed here are all of the battery charging choices out there to you in iOS 18.
What’s optimized battery charging on iPhone?
Your iPhone can be taught your charging habits to maintain 100% charging to a minimal
Optimized battery charging is a intelligent function that makes use of on-device machine studying to get to know your charging habits. It then adapts how your iPhone prices in an effort to extend your battery life. For instance, in case you go to mattress at 11PM every night time, put your iPhone on its charging stand, and take it off once more whenever you rise up at 7AM, your iPhone will be taught this routine. It’ll then cease charging at 80% through the night time and can begin charging once more simply in time so that you can get up together with your battery absolutely charged to 100%. It may possibly take as much as two weeks to your iPhone to be taught your habits earlier than the optimized charging will kick in.
Optimized battery charging is on the market on any iPhone that may run iOS 13 or later. For those who’re utilizing an iPhone 15 or iPhone 16 working iOS 18, optimized battery charging is barely out there as an choice when your Cost Restrict is about to 100%.
What’s the Cost Restrict setting in iOS 18?
You now have extra management over how a lot your battery will get charged
The iPhone 15 collection was the primary set of iPhones that added a brand new choice alongside optimized charging. Together with the choice to show optimized charging on or off, in iOS 17 there was additionally a 3rd choice: 80% Restrict. As you would possibly count on, this feature stopped your iPhone charging past 80%, even when left plugged in for days on finish. Your iPhone 15 would not get absolutely charged, however by not charging to 100%, it could extend the battery life of your iPhone.
In iOS 18, Apple has taken this function one step additional. For those who personal any of the iPhone 15 or iPhone 16 fashions, you will now see a brand new choice referred to as Cost Restrict that replaces the 80% Restrict choice. Cost Restrict is a slider with 5 settings: 80%, 85%, 90%, 95%, and 100%. You may choose any of those 5 settings, and your iPhone will mechanically cease charging when it reaches your chosen restrict.
If you choose 100%, the Optimized Battery Charging toggle will grow to be lively, permitting you to decide on whether or not or to not use this setting. If you choose a Cost Restrict beneath 100%, you will not be capable to flip this on; your iPhone will at all times cease charging on the chosen restrict.
For older iPhones, you will not see the Cost Restrict choice in your Battery settings; you will solely have the choice to show Optimized Battery Charging on or off.
How you can use the Cost Restrict setting in iOS 18
Choose a restrict for charging between 80% and 100%
You may set a Cost Restrict inside your iPhone’s Battery settings. Many settings choices have moved round a little bit in iOS 18, and the earlier Battery Well being and Charging settings have been cut up into two sections: Battery Well being and Charging. Unsurprisingly, the Cost Restrict settings are discovered within the Charging settings.
- Open the Settings app.
- Scroll down and faucet Battery.
- Choose Charging.
- Use the slider to pick out from a Cost Restrict of 80%, 85%, 90%, 95%, or 100%.
- If you choose 100%, you may have the choice to toggle Optimized Battery Charging on or off.
How you can pause the Cost Restrict quickly
You may cost as much as 100% in case you ever must
If you’re at dwelling or at work, you in all probability have easy accessibility to a phone charger. Setting your Cost Restrict to 80% is not a lot of a problem when you’ll be able to cost your iPhone each time it will get too low.
Nonetheless, there could also be occasions when you would do with some additional juice, resembling in case you’re occurring a protracted journey with none technique of charging. If that is so, you’ll be able to quickly pause your Cost Restrict, permitting you to cost your iPhone all the best way as much as 100%. Your Cost Restrict will then return to its earlier setting the following day.
- Open the Settings app.
- Faucet Battery.
- Faucet Charging.
- Drag the Cost Restrict slider to 100%.
- Faucet Enable Till Tomorrow to let your iPhone cost to 100% for in the future solely.
- Choose Set Restrict to 100% to at all times enable your iPhone to cost 100%.
My iPhone remains to be charging to 100%
You’ll hit full cost sometimes for calibration
For those who select to make use of a cost restrict in your iPhone 15 or iPhone 16, it’s possible you’ll discover that it nonetheless prices as much as 100% typically. That is a part of the function; your iPhone must cost to 100% every so often in an effort to re-calibrate. As your battery ages, the quantity of cost that it will possibly maintain will slowly scale back, which in flip signifies that the 80% worth can even lower over time. By charging your iPhone to the complete capability of the battery, your iPhone can get a extra correct image of what 80% seems like.
Which iPhones have Cost Limits in iOS 18?
Solely the newer iPhones can use the function
Apple/Pocket-lint
You probably have an older iPhone, this function could sound like precisely what it’s good to eke out a little bit extra life out of your battery. Sadly, nevertheless, if in case you have an older iPhone, the function might be not supported. At present, the one iPhones that supply the cost restrict choices for battery charging are as follows:

Apple iPhone 16
This yr’s iPhone 16 line blurs the road between the “Professional” and the base-level iPhone by providing a brand new digicam button and the Motion Button, alongside the A18 chip.
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