The Most Common Reasons Your iPhone Stops Charging
An iPhone that won't charge usually has one of five problems: a damaged charging cable, lint or corrosion in the charging port, a software issue that's preventing the battery from accepting power, a faulty charger, or actual battery failure. Most of the time it's the cable or port — these wear out faster than the phone itself because you bend them, step on them, and plug them in hundreds of times.
Before you assume the battery is dead, you should test each part separately. A cable that works fine one day can stop working the next because the internal wires have frayed. A charger that charges your iPad might not have enough power for your iPhone model. And a port that looks clean to your eye can have debris deep inside that breaks the connection.
The good news is that most of these problems are fixable without a repair shop, and the diagnosis takes about ten minutes.
Key Takeaways
- The charging cable is the most common culprit — test it with a different iPhone or iPad first to know whether the cable or your phone is the problem.
- Lint and corrosion in the charging port block the connection even when everything else works, and you can often clear it with a flashlight and a wooden toothpick.
- Force restart your iPhone before trying a different charger, because a software glitch can prevent charging even when the hardware is fine.
- If your phone charges slowly or only when held at an angle, the port is likely damaged and will need professional replacement.
Test Your Cable First
The charging cable is the easiest part to test and the most likely culprit. Borrow another iPhone or iPad and plug your cable into it. If that device charges normally, your cable is fine and the problem is in your phone. If the borrowed device also won't charge, your cable is broken and you need a replacement.
When you buy a replacement, make sure it's a USB-C to Lightning cable if you have an iPhone 15 or newer, or a Lightning to USB-A cable if you have an older model. The connector type matters — a cable with the wrong connector won't fit at all. Apple's official cables cost more but last longer; third-party cables from Anker or Belkin are cheaper and usually reliable if you buy from a major retailer.
While you have the borrowed cable, also test it with your phone's charger brick (the power adapter that plugs into the wall). Plug the borrowed cable into your charger and into your iPhone. If your phone charges with the borrowed cable, you've confirmed the cable was the problem. If it still won't charge, move to the next step.
Check and Clean the Charging Port
Lint, dust, and corrosion build up inside the charging port over months of use. You can often see it if you shine a flashlight into the port and look closely — it appears as dark fuzz or a white crusty coating. This debris blocks the metal connectors from making contact with the cable.
To clean the port safely, use a wooden toothpick or a soft plastic pick. Do not use metal, because metal can short the connectors and damage the phone permanently. Gently scrape the sides and bottom of the port while looking with a flashlight. Work slowly and let debris fall out naturally — do not dig or explore pressure. This usually takes two to three minutes.
After cleaning, plug in your cable and see if it charges. If it does, you're done. If the port still looks corroded or crusty after cleaning, the corrosion has likely damaged the connectors and the port will need professional replacement — this is not something you can fix at home.
Force Restart Your iPhone
A software glitch can prevent your phone from recognizing that it's plugged in, even though the hardware is working. A force restart clears this glitch without erasing anything on your phone.
The steps depend on your iPhone model. On iPhone 8 and newer, quickly press and release the Volume Up button, then quickly press and release the Volume Down button, then press and hold the Side button until the power-off slider appears. Drag the slider to turn off the phone, wait 30 seconds, then press and hold the Side button again until the Apple logo appears.
On iPhone 7 and 7 Plus, press and hold the Volume Down button and the Side button together until the power-off slider appears, then follow the same steps. On iPhone 6s and earlier, press and hold the Top (or Side) button and the Home button together until the Apple logo appears.
After the restart, plug in your cable and charger. If your phone charges now, the problem was a software glitch and you're done. If it still won't charge, continue to the next step.
Test a Different Charger
The power adapter (the brick that plugs into the wall) can fail without any obvious sign. Test your phone with a different charger — borrow one from a friend, use a charger from another device if you have one, or try a charger at a phone store.
Make sure the charger has enough power for your phone. iPhones need at least 5 watts; newer models charge faster with 20 watts or more. The wattage is printed on the charger itself. If you use a charger with too little power, your phone might charge very slowly or not at all, especially if you're using it while charging.
Plug the different charger into the wall, connect your cable, and plug it into your phone. If your phone charges with the different charger, your original charger is broken. If it still won't charge with multiple chargers, the problem is inside your phone.
Signs the Battery or Port Needs Professional Repair
If your phone won't charge even after testing a different cable and charger, and the port looks clean, the battery or the charging port itself is likely damaged. You should take your phone to an Apple Store or an authorized repair shop.
Before you go, note any patterns you've noticed: Does the phone charge only when held at a certain angle? Does it charge very slowly? Does it get hot while charging? Does it charge for a few seconds then stop? These details help the technician diagnose the problem faster.
Battery replacement usually costs between $50 and $100 depending on your iPhone model. Port replacement costs more because it requires more labor. If your phone is very old, the repair might cost more than a used replacement phone, so ask for a quote before you commit.
Prevent Charging Problems Going Forward
Most charging problems come from wear and tear on the cable and port. You can extend their life by handling the cable gently — don't bend it sharply, don't wrap it tightly around your charger, and don't let it get pinched under furniture or wheels.
Keep the charging port dry and away from lint. If you use your phone in a dusty environment, consider a small protective cap for the port when you're not charging. Avoid third-party chargers from unknown brands, because cheap chargers can damage the battery over time and sometimes overheat.
When you're not using your phone for more than a few weeks, charge it to about 50 percent and store it in a cool place. Letting a battery sit completely empty or completely full for months can reduce its lifespan.
Frequently Asked Questions
Why does my iPhone charge only when I hold the cable at an angle?
This means the charging port is damaged or the connectors inside are bent. The cable is making contact only when you hold it in a specific position. This will get worse over time, and the port will eventually stop working entirely. You need professional port replacement.
Can I use any USB-C cable to charge my iPhone 15?
Yes, any USB-C to Lightning cable will work, but quality varies. Apple's official cables are more durable. Third-party cables from established brands like Anker or Belkin are cheaper and usually reliable. Avoid very cheap cables from unknown sellers, because they can damage the port or battery.
My iPhone gets very hot while charging. Is that normal?
Some warmth is normal, but if it's too hot to hold comfortably, something is wrong. Stop charging when ready and try a different charger. If it still gets hot, the battery may be failing and you should have it checked by a technician. Heat damages the battery and can be a fire risk.
Does leaving my iPhone plugged in overnight damage the battery?
Modern iPhones have software that stops charging at 100 percent and keeps the battery at that level without overcharging. Occasional overnight charging won't harm the battery. However, if you charge overnight every night for years, the battery will degrade faster than if you unplugged it at 100 percent. For the longest battery lifespan, unplug when the phone reaches full charge.
What if my iPhone won't charge and it's completely dead?
Leave it plugged in for at least 30 minutes before assuming it won't charge. A completely drained battery sometimes needs time to accept power again. If nothing appears on the screen after 30 minutes, try a different charger and cable. If it still shows no sign of life, the battery may need professional replacement.