What To Do If Your iPhone Won't Charge

Few things are more frustrating than plugging in your iPhone and watching nothing happen. No charging symbol, no chime, no battery percentage creeping upward. Before assuming the worst, it helps to understand why iPhones fail to charge — because the cause determines the fix, and most of them are more straightforward than you'd expect.

Start With the Simplest Explanations

The most common charging failures have nothing to do with hardware damage. They're environmental, accidental, or software-related — and they're fixable in under a minute.

Check for debris in the Lightning or USB-C port. This is the single most overlooked cause of charging failure. Lint, dust, and pocket debris compact into the port over time, preventing the cable from making proper electrical contact. Shine a flashlight into the port. If you see buildup, use a wooden or plastic toothpick (never metal) to gently clear it out. This fix works more often than most people expect.

Inspect your cable and adapter. Cables fail. The insulation frays, internal wires break near the connectors, and cheap third-party cables degrade quickly. Try a different cable — ideally one you know works — before diagnosing anything else. Also check the power adapter itself. A dead adapter is easy to overlook.

Try a different power source. Wall outlet, USB port on a computer, car charger, and portable battery packs all behave differently. Some USB ports on computers deliver too little power to charge an iPhone under load. If charging seems slow or unresponsive, move to a wall outlet with a proper wattage adapter.

Restart and Software Resets 🔄

iPhones occasionally hit software states where charging is recognized but not processed correctly. The battery indicator may not update, or the phone may not respond to the charger at all.

Force restart your iPhone. This clears temporary software glitches without affecting your data:

• iPhone 8 or later: Press and quickly release Volume Up, press and quickly release Volume Down, then press and hold the Side button until the Apple logo appears.
• iPhone 7: Hold Volume Down and Sleep/Wake simultaneously until the Apple logo appears.
• iPhone 6s or earlier: Hold Home and Sleep/Wake together.

After restarting, reconnect the charger and check if the battery icon responds.

Check for iOS updates. Apple occasionally releases updates that address battery management and charging behavior. Go to Settings → General → Software Update to see if anything is pending.

Cable and Accessory Compatibility

Not all charging accessories are created equal, and iOS actively screens for this.

MFi certification matters. Apple's "Made for iPhone" program certifies that accessories meet electrical and communication standards for safe use with iOS devices. Non-certified cables may work inconsistently, trigger the "This accessory may not be supported" alert, or charge slowly due to wattage mismatches.

Lightning vs. USB-C. iPhones released before the iPhone 15 use Lightning connectors. iPhone 15 and later use USB-C. Using the wrong cable physically won't connect, but using a USB-C cable with an older USB-A adapter — or mismatching charger wattages — can result in slow or interrupted charging.

Wattage affects speed, not whether charging works at all — but severely underpowered adapters may struggle to charge a phone that's actively in use.

When the Port or Battery Is the Problem ⚡

If you've ruled out cables, adapters, debris, and software, the issue may be physical.

Port damage. A bent pin inside the Lightning or USB-C port, corrosion from moisture exposure, or physical impact can prevent proper charging contact. If the cable feels loose, wiggles excessively, or only charges at certain angles, the port itself may need service.

Battery health degradation. iPhone batteries are electrochemical components with a finite lifespan. Apple considers a battery "worn" below 80% maximum capacity, which can manifest as erratic charging behavior, faster drainage, or unexpected shutoffs. Check Settings → Battery → Battery Health & Charging to see your battery's current maximum capacity. If it's below 80%, battery replacement becomes relevant.

Liquid damage. iPhones with water resistance ratings (IP67 or IP68) can withstand splashes and brief submersion under controlled conditions — but those ratings aren't permanent guarantees. Corrosion can develop gradually after liquid exposure. If your phone was recently wet and now won't charge, moisture in the port is a likely culprit. Apple recommends letting the device dry completely before reconnecting a cable — never use heat to speed this up.

What Affects the Right Path Forward

The appropriate next step depends on factors that vary significantly from one iPhone to another:

• Your iPhone model determines connector type, battery capacity, and which fast-charging standards apply
• How old the device is affects whether the battery is within normal wear range or approaching replacement
• Your iOS version influences whether a software fix exists or whether an update might resolve the behavior
• Whether your device is under warranty or covered by AppleCare+ changes the cost and availability of official repair
• Your technical comfort level determines whether port cleaning and DIY diagnosis make sense, or whether a Genius Bar visit is the more practical starting point

Two people with "iPhone won't charge" as their problem may need completely different solutions depending on whether one has a two-year-old phone with a failing battery and the other has lint in a port they've never cleaned. The diagnostic path that fits your situation depends on what you find when you start working through these steps.