The most common reason your iPhone won't charge is a problem with the cable or port, not the battery itself
When your iPhone stops charging, the issue is usually one of three things: the cable is damaged, the charging port has lint or debris blocking the connection, or the power adapter has failed. These account for the vast majority of charging problems. A genuinely dead battery that won't hold a charge is much rarer and typically only happens after years of heavy use or physical damage to the phone.
The good news is that you can test most of these problems yourself in a few minutes without tools or a trip to a repair shop. Start with the simplest fixes first — they work more often than you'd expect.
Key Takeaways
- Inspect your charging cable for visible damage like fraying, kinks, or exposed wires, and try a different cable if you have one available.
- Clean the charging port on the bottom of your iPhone with a dry toothpick or soft brush to remove lint and debris that blocks the connection.
- Test your power adapter by plugging it into a different outlet and trying a different USB-C or Lightning cable to isolate whether the adapter is the problem.
- Force restart your iPhone by pressing and releasing the volume up button, then the volume down button, then holding the side button until the Apple logo appears.
- If none of these steps work, the issue may be inside the phone and requires service from Apple or an authorized repair shop.
Check your charging cable first
The cable is the part of your charging setup that gets bent, twisted, stepped on, and wrapped around things — so it fails more often than anything else. Look at the entire length of the cable, especially where it connects to the power adapter and where it plugs into your phone. You're looking for visible cracks, fraying, kinks that don't straighten out, or exposed wires underneath the rubber coating.
If you see any damage, the cable needs to be replaced. Even small cracks can cause charging to stop working or work only when the cable is bent a certain way. If your cable looks fine but you have another one available, try charging with the other cable anyway. Sometimes damage is internal and not visible from the outside.
Use only cables made by Apple or certified third-party manufacturers. Cheap knockoff cables can damage your phone's charging port or battery over time, even if they seem to work at first.
Clean the charging port on your iPhone
The charging port at the bottom of your iPhone collects lint from pockets, dust from bags, and debris from tables. Over time, this buildup prevents the charging cable from making a solid connection. You can clean this yourself with items you likely already have at home.
Turn off your iPhone first. Use a dry toothpick or the edge of a plastic SIM card ejector tool to gently scrape inside the port. Work slowly and carefully — you're trying to dislodge lint, not damage the tiny metal contacts inside. Shine a flashlight into the port to see what you're doing. If you see a lot of buildup, you may need to repeat this a few times, removing a little lint each time.
Do not use water, compressed air, or metal tools. Water can damage the internal components, compressed air can push lint deeper into the port, and metal tools can scratch the contacts and cause permanent damage. After cleaning, wait a few minutes before plugging in your cable to make sure any loosened particles have fallen out.
Test your power adapter and outlet
Your power adapter — the brick that plugs into the wall — can fail without showing obvious signs. Test it by plugging it into a different electrical outlet in your home. Sometimes the outlet itself is the problem, not the adapter. If you have access to another iPhone charger, try using that adapter with your cable.
If your iPhone charges with a different adapter but not with your original one, the adapter has failed and needs to be replaced. If it still won't charge with a different adapter, the problem is either your cable or something inside your phone.
Check that the outlet itself is working by plugging in something else — a lamp, a phone charger for a different device, anything you know works. If the outlet is dead, try a different outlet in another room.
Force restart your iPhone
Sometimes a software glitch prevents your iPhone from recognizing that it's plugged in, even though the hardware connection is fine. A force restart clears temporary software problems without erasing your data or settings.
The steps depend on which iPhone model you have. For iPhone X and newer: press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the side button (the power button) until you see the Apple logo appear on the screen. This usually takes about 10 seconds. Keep holding even after the "slide to power off" screen appears — you're waiting for the Apple logo.
For iPhone 8 and earlier: press and hold both the top (or side) button and the volume down button together until the Apple logo appears. Again, this takes about 10 seconds and you'll see the power-off screen first.
After the restart completes and your iPhone turns back on, plug it in and see if it charges normally.
Update your iPhone if it's stuck on an old version
Rarely, an outdated iOS version can cause charging problems. If your iPhone is several versions behind the current release, updating may fix the issue. Connect to Wi-Fi, go to Settings, tap General, then tap Software Update. If an update is available, follow the prompts to install it.
Your iPhone will restart during the update process. This is normal. Make sure your battery has at least 20 percent charge before you start, or plug in your charger even if it's not working perfectly — the update process sometimes works with a weak connection.
When to seek professional repair
If you've tried all the steps above and your iPhone still won't charge, the problem is likely inside the phone — either the charging port is damaged internally, the battery itself has failed, or a component on the logic board has stopped working. These require professional service.
Visit an Apple Store or an authorized Apple service provider. Bring your iPhone and any cables or adapters you've tested. Tell the technician what you've already tried — this helps them narrow down the problem faster. If your iPhone is still under warranty or covered by AppleCare+, the repair may be free or low-cost. If not, ask for a repair estimate before they start work.
Third-party repair shops can sometimes fix charging problems for less money than Apple, but make sure they use genuine parts or certified replacements. A cheap repair using low-quality components can cause problems later.
Frequently Asked Questions
Why does my iPhone only charge when the cable is bent a certain way?
This almost always means the cable has internal damage, even if the outside looks fine. The wires inside are broken or partially broken, and bending the cable a specific way temporarily reconnects them. Replace the cable — continuing to use it risks damaging your phone's charging port.
Can I use any USB-C or Lightning cable to charge my iPhone?
Any certified Lightning or USB-C cable will work, but stick with Apple's cables or cables from reputable manufacturers with good reviews. Cheap knockoffs may charge your phone but can damage the port or battery over time. Check the packaging for "Made for iPhone" or equivalent certification.
Is it bad to leave my iPhone plugged in overnight?
Modern iPhones have built-in protection that stops charging once the battery reaches 100 percent, so leaving it plugged in won't damage the battery. However, keeping your phone plugged in constantly does cause very gradual battery wear over months and years. If you can, unplug it once it's fully charged.
What does it mean if my iPhone gets hot while charging?
Some warmth is normal, but if your phone is too hot to hold comfortably, unplug it when ready. This can indicate a problem with the cable, adapter, or battery. Let it cool down, then try charging again with a different cable and adapter. If it heats up again, stop using that charger and contact Apple.
Will Apple replace my battery if it won't charge?
Apple can replace the battery, but first they need to confirm that the battery is actually the problem and not the cable or port. Bring your phone to an Apple Store for diagnosis. Battery replacement costs vary depending on your iPhone model and warranty status.