Your iPhone is plugged in but the battery isn’t moving.
No lightning bolt, no charging sound, nothing. It’s one of the more common iPhone problems and in most cases the fix is straightforward.
The main causes are: a dirty charging port, a faulty cable or adapter, a software glitch, a temperature issue, or a worn battery. Work through them in order and you’ll find the problem faster.
Quick Reference – Common Causes and Fixes
| Cause | What to Look For | Fix |
| Dirty charging port | Cable feels loose, charges intermittently | Clean port with a wooden toothpick or soft brush |
| Faulty cable or adapter | Works with a different cable | Swap the cable and adapter |
| Software glitch | Phone was freezing or overheating recently | Restart the phone, check for iOS updates |
| Optimised battery charging | Phone stops at 80% or charges slowly overnight | Normal behaviour – can be adjusted in Settings |
| Temperature too high or low | Phone was in sun, a car, or used heavily | Let it cool or warm naturally, then retry |
| Battery degradation | Older phone, inconsistent charging over time | Battery replacement |
| Charging chip fault | None of the above work | Professional assessment needed |
How to Fix an iPhone That Won’t Charge – Step by Step
Step 1 – Check the Cable and Adapter First
Swap the cable. Try a different adapter. Plug into a different wall socket or a laptop USB port. This rules out the most common cause in under two minutes. If charging starts with a different cable, the original is faulty.
Pay attention to whether charging is intermittent. If it cuts in and out, the connection is unstable rather than completely broken – usually the cable or port.
Step 2 – Clean the Charging Port
Charging ports collect lint and dust, especially if you carry your phone in a pocket. Fabric fibres compress into the port over time and create enough of a barrier to stop the connection working properly. It’s a small thing that causes a lot of unexplained charging failures.
Use a wooden toothpick or a soft brush. Work gently. Don’t use metal objects – they can damage the internal pins. One careful clean often restores charging instantly.
Step 3 – Restart and Update
If the hardware checks out, the problem may be a software glitch. A restart clears minor bugs quickly. If the phone has been freezing or behaving strangely, a full iOS update is worth doing.
Also worth checking: as of 2026, iOS’s optimised battery charging feature intentionally slows charging to protect long-term battery health. It’s documented by Apple in their iPhone battery and charging guide. If your phone stops at 80% or charges slowly overnight, that’s the feature working as designed, not a fault. You can adjust it under Settings – Battery – Battery Health and Charging.
Step 4 – Let the Phone Reach a Safe Temperature
iPhones stop charging when they’re too hot or too cold. Apple’s safe operating temperature for charging is 0°C to 35°C. Outside that range, the system halts charging to prevent damage.
If the phone has been in direct sunlight, left in a car, or used heavily while plugged in, it may just need time to return to a normal temperature. Move it somewhere cool or warm, leave it for 10 minutes, then try again.
Step 5 – Consider Battery or Hardware Issues
If you’ve worked through the steps above and nothing has changed, the problem is likely internal. Batteries degrade over time and eventually lose the ability to receive charge efficiently. On older iPhones this is the most common hardware-level cause.
Less commonly, the charging chip inside the phone can fail. It happens more on devices that have had liquid exposure or taken a knock. At this point, a professional assessment is the right next step. iRestore’s iPhone repairs service includes charging issue diagnosis and battery replacement for all iPhone models, most completed the same day.
Frequently Asked Questions
Why is my iPhone plugged in but not charging?
The most common reasons are a dirty charging port, a faulty cable or adapter, or a software issue. A worn battery or a failed charging chip are less common but possible on older devices. Start by swapping the cable and cleaning the port – those two steps resolve the majority of iPhone charging problems without needing a repair.
Why does my iPhone stop charging at 80%?
This is iOS’s optimised battery charging feature, not a fault. The phone learns your overnight charging routine and deliberately slows or pauses charging to reduce battery wear. It will reach 100% before you need it. If you want to turn it off, go to Settings – Battery – Battery Health and Charging and disable the toggle.
Can a dirty charging port stop an iPhone from charging?
Yes. Lint and dust compress into the Lightning or USB-C port over time and create enough of a physical barrier to break the electrical connection. The phone may still appear plugged in while receiving no power. A careful clean with a wooden toothpick often fixes this completely without any repairs needed.
How do I know if my iPhone battery needs replacing?
Go to Settings – Battery – Battery Health and Charging. If the maximum capacity is below 80%, Apple considers the battery worn and recommends replacement. You may also notice the phone dying faster than expected, shutting down unexpectedly, or charging slowly even with a known-good cable and adapter.
When should I take my iPhone to a repair shop?
If you’ve tried a different cable, cleaned the port, restarted the phone and ruled out temperature issues, and the phone still won’t charge, it’s time for a professional look. A repair technician can test the battery health, inspect the charging port for pin damage, and check the charging chip – none of which can be assessed without the right tools.
