Why is my iPhone not charging?

Your iPhone may refuse to charge due to simple issues like a dirty port or faulty cable, or deeper problems like battery degradation or software glitches. Most cases resolve with basic troubleshooting, starting with the easiest checks. Follow these steps systematically to identify and fix the problem without needing tools or expertise.

Quick checks (try these first)

1. Inspect your cable and charger for damage like fraying, bent pins, or wear; swap with another Apple-certified (MFi) Lightning or USB-C cable and wall adapter if available.
2. Examine the charging port for lint, dust, or debris; gently clean it with a soft toothbrush, wooden toothpick, or compressed air while the phone is powered off—avoid metal objects.
3. Perform a restart: For iPhone X and later, press and quickly release volume up, then volume down, then hold the side button until the Apple logo appears; for older models, use the appropriate button combo.
4. Try a different power source, like another wall outlet or USB port on a computer, to rule out a faulty outlet.
5. If your iPhone supports it (iPhone 8 or later), test wireless charging on a Qi-certified pad with the case removed to bypass port or cable issues.
6. Check for overheating or extreme temperatures; move to a cool, shaded spot between 32°F and 95°F and wait a few minutes before retrying.

Faulty or incompatible cable or charger

The most frequent culprit is a damaged, worn, or non-certified cable or adapter that fails to make proper contact or deliver power. Lightning cables fray over time, USB-C adapters (iPhone 15 series) may mismatch with older chargers, and cheap third-party options often lack MFi certification, triggering safety blocks.

Even if the cable looks fine, internal wire breaks or corrosion can prevent charging. Wall adapters might not provide enough wattage, especially for newer models like iPhone 15 Pro Max needing higher power.

• Wipe the connector tip clean with a dry microfiber cloth.
• Test with at least two known-good, Apple-certified cables and adapters borrowed from another device.
• For iPhone 15+, ensure your USB-C cable and charger support at least 20W fast charging.
• Charge via a computer's USB port as a low-power test—if it works, the issue is likely your wall adapter.

Dirty or damaged charging port

Lint, pocket fuzz, or dust accumulates in the port over months, blocking the connector pins and preventing a solid connection. Drops or rough insertions can bend pins or crack the port internally, especially on Lightning ports in iPhone 12-14 models.

USB-C ports on iPhone 15 are more robust but still prone to debris. If cleaning doesn't help and wireless charging works, the port likely needs repair.

• Power off the iPhone completely.
• Use a flashlight to inspect; gently scrape out debris with a plastic toothpick or guitar pick—never force it.
• Blow out dust with short bursts of compressed air held upright.
• Test insertion: the cable should slide in smoothly without excessive wobble or resistance.
• If pins look bent, stop and seek service to avoid worsening damage.

Lightning port specifics (iPhone 14 and earlier)

• These ports attract more lint due to their design; clean weekly if you carry your phone in pockets.
• Avoid vacuum cleaners, as suction can push debris deeper.

USB-C port specifics (iPhone 15 series)

• Be gentler, as the oval shape holds less debris but damages easier from mismatched cables.
• Confirm reversible insertion—no "right way up."

Software glitches or iOS bugs

Temporary glitches from recent updates, app crashes, or background processes can halt charging detection. iOS updates sometimes introduce port recognition issues, fixed by restarts or patches.

Force restarts clear RAM without data loss, resolving 80% of software blocks. Check for iOS updates, as versions like iOS 18 address charging bugs.

1. Update iOS: Settings > General > Software Update; install if available while on Wi-Fi.
2. Force restart as described in quick checks.
3. Check Battery Health: Settings > Battery > Battery Health & Charging; note maximum capacity.
4. Reset All Settings: Settings > General > Transfer or Reset iPhone > Reset > Reset All Settings (preserves data).

Optimized Battery Charging or battery settings

Apple's Optimized Battery Charging pauses at 80% to prolong battery life, mimicking a "not charging" state overnight. This feature learns your routine and holds charge until needed.

Low Battery Health (under 80% capacity after cycles) slows charging intentionally. Toggle it off to test.

• Go to Settings > Battery > Battery Health & Charging.
• Turn off Optimized Battery Charging and Charge Limit if enabled.
• Wait 30 minutes; charging should resume past 80%.
• If capacity is below 80%, consider service for degradation.

Overheating or environmental factors

iPhones stop charging if too hot (from gaming/video while plugged in) or too cold, as a battery protection measure. Direct sun, thick cases, or ambient heat above 95°F triggers this.

Moisture detection from spills or humidity can lock the port temporarily, showing a liquid alert.

• Remove case and place in a cool (68-77°F), dry, ventilated spot for 20-30 minutes.
• Check for moisture: Shine a light in the port; if foggy, let dry 24-48 hours with silica packets nearby.
• Avoid charging in cars or outdoors during extremes.
• Monitor temperature in Settings > Battery during attempts.

Battery or hardware failure

Aged batteries (after 500+ cycles) charge slowly or not at all due to chemical wear. Faulty ports, logic board issues, or water damage require pro diagnosis.

iPhone 12-15 models show port damage from drops; wireless success confirms this.

• Review charge cycles in Settings > Battery > Battery Health.
• Test with multiple setups; if nothing works including wireless, it's hardware.
• Back up via iCloud or computer before service.

When to call a professional

Seek Apple Support or an authorized provider if basic fixes fail after exhaustive testing, especially with physical damage or error messages.

• No charging even wirelessly after 24 hours drying.
• Battery health below 80% with swelling or rapid drain.
• Liquid exposure indicators lit or port corrosion visible.
• Recent drop with non-responsive screen or other symptoms.
• Persistent "Accessory Not Supported" after cable swaps.

Frequently asked questions

Why does my iPhone say "Charging Slowly"?

This appears with low-power sources like unpowered USB hubs or damaged cables; switch to a 20W+ wall charger and certified cable for normal speed.

Will cleaning the port void my warranty?

No, gentle cleaning with recommended tools is safe and expected; only aggressive prying risks voiding it.

Can I charge my iPhone overnight if it's not reaching 100%?

Yes, Optimized Charging holds at 80% safely; it completes near wakeup time. Disable if you need full charge immediately.

What if my iPhone 15 won't charge with Lightning cables?

iPhone 15 switched to USB-C; Lightning won't fit or work—use a USB-C cable and compatible charger.

Does a case prevent charging?

Thick or metal cases block wireless (MagSafe/Qi) and overheat wired charging; remove during troubleshooting.

Why won't my iPhone charge after an iOS update?

Update bugs affect port detection; force restart, check for newer patches, or reset settings to fix.