Follow these steps and try again after each:
Plug your device into one of these power sources:
Computer
Power accessory
Wall power outlet
Check your charging cable and USB adapter for signs of damage, like breakage or bent prongs. Don't use damaged accessories.
Use a wall power outlet and check for firm connections between your charging cable, USB wall adapter, and wall outlet or AC power cable, or try a different outlet.
Remove any debris from the charging port on the bottom of your device, then firmly plug your charging cable into your device.
Let your device charge for half an hour.
If your device still won't power on or if the screen displays a battery icon, force restart your device:
iPhone 8 or later and iPhone SE (2nd generation and later): Press and quickly release the volume up button. Press and quickly release the volume down button. Press and hold the side button until the Apple logo appears.
iPhone 7, iPhone 7 Plus, and iPod touch (7th generation): Press and hold both the side (or top) button and the volume down button until the Apple logo appears.
iPhone 6s or earlier, iPhone SE (1st generation), and iPod touch (6th generation) or earlier: Press and hold both the side (or top) button and the Home button until the Apple logo appears.
Let your device charge for another half hour.
If your device still won't power on or charge, you might need service. Get service
iOS 13 and later use Optimized Battery Charging to slow the rate of battery aging by reducing the time that your iPhone spends fully charged. Your iPhone uses on-device machine learning to understand your daily charging routine so that it can wait until you need to use your iPhone to finish charging past 80 percent.* Optimized Battery Charging is active only when your iPhone predicts that it will be connected to a charger for a long period of time.
Your iPhone might get slightly warmer while it charges. To extend the lifespan of your battery, if the battery gets too warm, software might limit charging above 80 percent. Your iPhone will charge again when the temperature drops. Try moving your iPhone and charger to a cooler location.
Learn what to do if your battery gets too warm
With iPhone 15 models and later, you might have a charge limit, which stops your iPhone from charging past a set limit. If you want your iPhone to charge past 80 percent, change your charging limit.
Learn more about Charge Limit with iPhone 15 models and later
Connect your device directly to the charger, without any adapters or other equipment between your device and the charging accessory.
Remove any debris from the charging port on the bottom of your device.
Try a different USB cable or charger.
These alerts can appear for a few reasons:
Your iOS device might have a dirty or damaged charging port
Your charging accessory might be defective or damaged
Your USB charger might not be designed to charge devices
Learn what to do if your iPad won't charge or if the battery in your iPhone drains too quickly.
Learn how to identify counterfeit or uncertified Lightning connector accessories.
* Information regarding your charging routine is stored only on your iPhone. The information isn't included in backups and isn't shared with Apple.
Published Date: May 16, 2025
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