Can I charge an iPhone overnight?
Apple states that an iPhone stops charging when the battery is full, so leaving it connected overnight is safe. Learn how optimized charging manages the final top-up.
✓Sources reviewed 2026-09-10
Short answer
Yes. Apple's iPhone guidance says the iPhone automatically stops charging when the battery is fully charged, so it is safe to keep it connected overnight; charging resumes automatically if the level drops below about 95%. On iPhone 15 and later you can optionally set a Charge Limit if you prefer the phone to stop earlier.
Why
- Apple: "iPhone automatically stops charging when the battery is fully charged, so it's safe to keep your iPhone connected to a charger overnight. Charging resumes automatically if your battery level drops below 95 percent."
- Optimized Battery Charging is on by default and can hold the charge near 80% until shortly before your routine suggests you will need the phone.
- Charge current tapers as the battery fills, and iOS manages temperature: if conditions get too warm, charging pauses and later resumes on its own.
Important conditions
- In hot conditions iOS can pause charging ("Charging On Hold"), so the phone may not reach 100% until it cools down.
- iPhone 15 and later offer a Charge Limit between 80% and 100% in Settings → Battery → Charging when you want to cap the charge.
- Do not charge under pillows or blankets, and use a compliant cable and adapter with the phone.
What to do
- No daily action is needed — leave the phone connected and iOS manages the final top-up.
- Keep Optimized Battery Charging enabled under Settings → Battery → Charging.
- If the phone feels very warm, remove a thick case and move it to a cooler spot.