How to Fix an iPhone That's Not Charging

Few things are more frustrating than plugging in your iPhone and watching nothing happen. Before assuming the worst, it's worth knowing that most charging failures come down to a handful of fixable causes — and the majority don't require a trip to the Apple Store.

Why Your iPhone Might Not Be Charging

iPhone charging problems fall into two broad categories: hardware issues and software/configuration issues. Understanding which category you're dealing with changes everything about how you approach the fix.

Hardware issues involve physical components — the cable, adapter, charging port, or battery itself. Software issues involve iOS states, background processes, or settings that prevent normal power delivery even when the hardware is perfectly functional.

The tricky part: both can look identical from the outside. A phone that appears "not charging" might actually be charging slowly, might have a stuck software state, or might have a partially blocked port.

Start Here: The Quick Checks 🔍

Before diagnosing anything deeper, run through these first:

Check the cable. Lightning and USB-C cables are the most common failure point. Cables fray internally even when they look fine externally. Try a different cable — ideally an Apple-certified or MFi-certified one. Third-party cables that lack MFi certification can trigger the "This accessory may not be supported" warning, which blocks charging entirely.

Check the power adapter. A 5W adapter, 20W adapter, and a laptop USB port all deliver different wattage. If charging seems to have stopped entirely, try a different adapter or plug the cable into a different power source to isolate the variable.

Check the outlet. It sounds obvious, but a dead wall outlet or a tripped power strip is responsible for more "broken" devices than most people admit.

Clean the Charging Port

This is the most overlooked fix and often the most effective one. Pocket lint, dust, and debris compact inside the Lightning or USB-C port over time. When enough material builds up, the cable connector can't make full contact with the charging pins.

Use a dry, non-metallic tool — a wooden or plastic toothpick works well. Gently work around the inside edges of the port with the phone powered off. You may be surprised how much material comes out. Avoid metal objects, compressed air at close range, or moisture.

After cleaning, reconnect your cable and check whether the fit feels more secure. A cable that previously felt loose may seat firmly again.

Force Restart the iPhone

A hung or frozen iOS state can prevent charging recognition even when hardware is fine. A force restart clears the active memory state without affecting your data.

• iPhone 8 and later (including all Face ID models): 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 7/7 Plus: Press and hold Volume Down and Sleep/Wake simultaneously until the Apple logo appears.
• iPhone 6s and earlier: Press and hold Home and Sleep/Wake simultaneously.

After the restart, plug the phone back in. Many users find this resolves a charging failure that had no obvious physical cause.

Check iOS and Battery Settings

Optimized Battery Charging is an iOS feature (introduced in iOS 13) that intentionally pauses charging at 80% to reduce long-term battery wear. If your iPhone is sitting at 80% and appears to have stopped charging, this feature may be working as intended — not malfunctioning.

You'll find it under Settings → Battery → Battery Health & Charging.

Also check whether Low Power Mode is active. While Low Power Mode doesn't stop charging, it can sometimes cause confusion when combined with other display timeout settings that make it appear the screen isn't responding to charge state changes.

When the Problem Points to Hardware 🔧

If you've ruled out the cable, adapter, port debris, and software state, the issue likely involves internal hardware. The two most common culprits at this stage are:

Battery degradation is worth understanding separately. Apple's Battery Health feature (Settings → Battery → Battery Health & Charging) shows maximum capacity as a percentage. A battery showing below 80% capacity may struggle to charge normally under load, charge slower, or behave unpredictably. This is a calibration and chemistry issue, not a software bug.

Water or Physical Damage Considerations

iPhones from the iPhone 7 onward carry IP-rated water resistance, but water resistance degrades over time and doesn't mean waterproof. Liquid contact with the charging port — even from humidity — can trigger the Liquid Detected alert in iOS, which will block charging through the wired port as a protection measure.

If you see this alert, iOS will offer the option to charge anyway or to wait. The charging port needs to dry completely before normal use resumes. Wireless charging via MagSafe or a Qi pad remains available in the meantime on compatible models.

The Variables That Change the Answer

What "not charging" means and how it gets fixed depends on factors that vary significantly by user:

• Which iPhone model you have (port type, water resistance rating, battery size)
• How old the battery is and its current health percentage
• Which cables and adapters you're using and whether they're certified
• Whether the phone has been repaired before (third-party screen replacements can sometimes interfere with battery health reporting)
• Your iOS version and whether Optimized Battery Charging behavior is expected

A phone that's two years old with 78% battery health and a worn Lightning cable has a very different likely fix than a six-month-old iPhone 15 showing a Liquid Detected alert after a beach trip. The steps above cover the full diagnostic range — but which one applies depends entirely on where your specific situation lands.