iPhone 15 Not Charging

🔍 Step 1: Diagnose the Symptom

• No charging icon, no chime when plugged in: Port clog, bad cable, or power adapter issue
• "Charging Not Supported With This Accessory" alert: Non-certified USB-C cable or adapter
• Charges slowly (less than 10% per hour): Low-wattage adapter or cable not rated for 27W
• Charges intermittently, wiggles in port: Damaged USB-C port or bent pin
• Gets very hot while charging: Charging while using intensive apps — enable Optimized Battery Charging
• Stops at 80%: Optimized Battery Charging is active — this is normal, not a fault

🧹 Step 2: Clean the USB-C Port

USB-C port lint buildup is the #1 cause of iPhone 15 charging failure. The port opening is small and collects pocket lint quickly:

1. Power off the iPhone 15 completely (Side + Volume, slide to power off)
2. Use a bright flashlight to inspect the port — you'll often see a clearly visible grey or black lint plug
3. Use a wooden or plastic toothpick — angle it along the bottom of the port and gently scrape lint toward the opening. Never use metal tools; the USB-C pins bend easily
4. A can of compressed air blown at an angle can loosen debris, but blow from the side — never straight in
5. Repeat until the interior looks clean (shiny gold or silver pin contacts visible)
6. Plug in cable — you should feel a firm click when seated correctly

🔌 Step 3: Test Cable and Adapter

Not all USB-C cables work the same. iPhone 15 requires specific cable specs for fast charging:

1. Try a different USB-C cable — cheap cables often can't negotiate 27W charging. Use Apple's included cable or an MFi-certified alternative
2. Try a different adapter — a 20W USB-C power brick is the minimum for normal charging speed; 30W+ for fast charging
3. Test the cable with another device (MacBook, iPad) to confirm the cable works
4. Test your adapter with a different cable to confirm the adapter works
5. Avoid USB-A to USB-C cables for iPhone 15 — these max out at 5W (extremely slow)
6. If using a laptop USB-C port: many deliver only 7.5–15W — use a dedicated wall adapter for reliable charging

🔄 Step 4: Force Restart

A software crash can prevent the charging circuit from being recognized by iOS:

1. Press and quickly release Volume Up
2. Press and quickly release Volume Down
3. Press and hold the Side button for 10–15 seconds until the Apple logo appears
4. Release and let the phone boot fully
5. Plug in the charger after restart — check if charging now works

⚙️ Step 5: Check iOS Settings

• Optimized Battery Charging: Settings → Battery → Battery Health & Charging → toggle this off temporarily to test if that's why charging stopped at 80%
• USB Accessories lock screen block: Settings → Face ID & Passcode → "USB Accessories" — if off, USB-C charging accessories may be blocked when locked for over an hour
• Low Power Mode can slow charging rate display: Settings → Battery → Low Power Mode — it limits background activity which can make battery indicator update slowly
• Update iOS: Settings → General → Software Update — several iOS 17 and 18 releases included charging bug fixes

🔋 Step 6: Check Battery Health

Go to Settings → Battery → Battery Health & Charging. If Maximum Capacity is below 80%, the battery may have swollen or degraded enough to cause charging issues. A replacement is recommended. Apple charges $89 for iPhone 15 battery replacement out of warranty; independent shops charge $40–65.

💧 Step 7: Water Damage Check

iPhone 15 is IP68 rated (6m for 30 min) but water resistance degrades over time:

• Check the Liquid Contact Indicator (LCI) — insert a SIM tool into the SIM tray slot and look for a red or pink dot (normal is white/silver)
• If you recently got the phone wet, leave it in a dry room with good airflow for 24 hours before charging again
• Never use a hair dryer or heat gun — this causes more damage
• Apple's "Liquid Detected in USB-C Connector" alert means water is still in the port — follow the on-screen dismiss steps

✅ Quick Fix Checklist

• ☐ USB-C port inspected and cleaned of lint
• ☐ Different USB-C cable tested (MFi-certified, 27W+)
• ☐ Different power adapter tested (20W+ USB-C)
• ☐ Force restart performed
• ☐ Optimized Battery Charging checked (not stopping at 80%)
• ☐ USB Accessories setting checked in Face ID & Passcode
• ☐ iOS updated to latest version
• ☐ Battery Health checked (above 80%?)