You Aren’t Keeping Your Battery Healthy

If doesn’t matter if you have the most powerful iPhone in the world if your battery can’t last for more than a few hours.
Your iPhone’s battery will start to age over time. While that’s a normal process for any rechargeable battery, there are ways for you to slow down that aging process, making your iPhone last longer than it otherwise might.
For starters, many experts recommend that you don’t fully charge or fully drain your iPhone regularly. It’s always been recommended that you keep your iPhone between 20% and 80% as much as possible.
Fortunately, if you always want to fully charge your iPhone, Apple has implemented a feature to help you keep your iPhone’s battery from aging.
This feature is called Optimized Battery Charging, and it’ll make your iPhone learn your charging patterns so it can charge itself at a slower pace once it gets to the 80% mark.
For instance, your iPhone might reach 80% at 8 PM, but it won’t charge to 100% until you’re ready to start your day in the morning. This will keep your battery from aging prematurely, and you won’t have to worry about keeping it at 80% yourself.
If you have an iPhone 15, you can even prevent your iPhone from charging above 80% at all.
Optimized Battery Charging should be turned on by default, but you can enable it yourself by going to Settings > Battery > Battery Health & Charging and then turning on Optimized Battery Charging. iPhone 15 owners will find the additional option in here to set an 80% Limit, which will stop charging entirely once it reaches 80%.