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iPhone 15 Charging Slowly or Not Charging – Quick Power Fix
Get fast charging working again with proven solutions
Symptoms
- Charging takes much longer than usual
- Phone charges only when powered off
- Charging stops and starts randomly
- iPhone warms up while charging
- Fast charging not working
- Issue started after iOS 26 update
Common Causes
- Faulty cable or adapter
- USB-C port debris
- iOS 26 charging bugs
- Optimized Charging slowing down speed
- High temperature reducing charging rate
- Background apps consuming power
- Low-quality chargers
Quick Fixes
1. Restart the Device
Fixes temporary charging controller issues.
2. Clean the USB-C Port
Use a wooden toothpick to remove lint or dust.
3. Try a Different Cable and Adapter
Use an Apple-certified USB-C cable and 20W+ adapter.
4. Turn Off Optimized Charging
Settings → Battery → Battery Health → Optimized Charging → Off.
5. Remove the Case
Cases trap heat and slow down charging.
Advanced Solutions
1. Reset All Settings
Fixes corrupted charging and power preferences.
2. Update to Latest iOS
Later iOS 26 builds fix charging bugs.
3. Charge Using a Wall Adapter
Avoid laptops, cars, and low-power USB ports.
4. Turn Off Background App Refresh
Reduces power consumption during charging.
FAQ
Why does my iPhone charge slowly when hot?
The phone reduces charging speed to protect the battery.
Does fast charging damage the battery?
No — Apple manages charging to prevent damage.