A charging issue is another problem faced by numerous iPhone users, along with broken screens. It would be common to sense that your iPhone's battery is running out, but a software feature might be what can stop your device from charging beyond 80%.

Knowing how such a scenario occurs might save you from undue worry or an expensive battery replacement.

Why Does Your iPhone Stop Charging at 80%

Your iPhone Stops Charging at 80%: How to Fix

If your iPhone is stuck at 80%, most probably it has to do with Optimized Battery Charging, one of the features iOS does. A feature designed and intended to reduce battery stress, thus increasing the lifespan of the battery, not charging it above 80% till depleted again.

This service stops putting it on full charge, saving users from long-term degradation, as batteries degrade much faster when left on a full charge for extended periods.

However, despite this power-saving feature being turned off, your iPhone may, when the battery overheats too much during charging, refuse to continue charging at 80%. The system does not like it when the battery gets too hot and could get damaged. Therefore, it limits the charge through iOS.

To address this, you just need to unplug your iPhone for some time to cool down.
Connect and start charging the iPhone normally once its temperature goes back to normal.

Optimized Battery Charging: How It Extends The Life Span Of Your iPhone

Most of the users charge their phones overnight. This way, they wake up the next morning and have a completely charged device ready. However, keeping your iPhone at 100% for a long time accelerates battery degradation, and, as we have learned, lithium-ion is sensitive to imbalance.

That's where Optimized Battery Charging comes in. It will not let your iPhone charge to 100% when you are asleep; it will only fill up to that full capacity when required, such as right before you wake up. This helps to keep stress off of the battery while it is asleep because the iPhone is kept at about an 80% charge throughout most of the night.

The technology works by mastering your daily charging pattern. It calculates when you'll actually need a full charge and will delay reaching 100% until the moment you will need it, or basically the early morning.

How to Disable Optimized Battery Charging on Your iPhone

However, Optimized Battery Charging is very good and for some users, their iPhones are required to charge up to 100% right away because they are going to use them for a longer period. Refer to the steps below:

1. Open the Settings on your iPhone.
2. Tap on Battery.
3. Select Battery Health.
4. Toggle off Optimized Battery Charging.
5. You will then be presented with two options: Turn Off Until Tomorrow, or Turn Off (permanently). Take any of the options you like.

However, for larger model users, like the iPhone 14 Pro Max or iPhone 14 Plus, this feature is left mostly enabled since these phones normally provide great battery life.

Optimizing Your iPhone's Battery Life

Even with the best care that you can muster for your iPhone, no way will you notice it showing signs of its advanced age after three years of usage.

However, through the best practices such as Optimized Battery Charging, the avoidance of extreme temperatures, and refraining from letting your battery go flat to dead, you could easily extend the lifespan of your battery and optimize your device.

Proper care in managing your battery will ensure that your iPhone lasts long and does not have to be replaced often or at too high a cost. Proper management of your charging habits will maximize your iPhone's lifespan and performance, enabling it to serve you for years to come.