iPhone 8 Plus Not Charging or Charging Slowly? Here’s How to Fix It

If your iPhone 8 Plus isn’t charging at all or takes forever to juice up, don’t panic just yet. Whether it’s stuck at 80%, says “accessory not supported,” or simply doesn’t respond when plugged in—most charging issues are fixable without a trip to the Apple Store. Here’s how to troubleshoot and get your device powered up again.

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1. Inspect Your Charging Cable and Adapter

Start with the basics. If your cable or adapter is damaged, your iPhone may not charge properly—or at all.

• Look for frayed cables, bent prongs, or scorch marks
• Try a different Apple-certified charger and Lightning cable
• Test a different wall outlet or USB port

🔌 Pro tip: Avoid off-brand or non-certified accessories—they often trigger charging errors.

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2. Clean the Charging Port

Pocket lint, dust, or debris can block a solid connection.

• Use a flashlight to check the Lightning port
• Gently clean it using a soft brush or anti-static tool

Avoid using anything metallic that could damage the contacts.

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3. Force Restart Your iPhone 8 Plus

A quick reboot can clear out minor software glitches affecting charging.

• Press and quickly release the Volume Up button
• Press and quickly release the Volume Down button
• Hold the Side (Power) button until the Apple logo appears

Then plug your phone in and let it charge for at least 30 minutes.

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4. Try a Different Charging Method

If wired charging fails:

• Try wireless charging using a Qi-certified charger
• Be sure the phone is centered and the charger is powered on
• Remove thick cases or accessories that might interfere

You can also try charging through:

• A powered USB hub
• A computer USB port (ensure the computer is awake)

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5. Update iOS and Carrier Settings

Outdated software can cause charging bugs.

• Go to Settings > General > Software Update
• If an update is available, download and install it

Also check for carrier updates:

• Go to Settings > General > About
• If prompted, tap Update

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6. Perform a DFU Restore (Advanced)

Still not working? A deep-level Device Firmware Update (DFU) restore can help.

⚠️ Backup your data first—this will erase everything.

To enter DFU mode:

1. Connect iPhone to a computer and open iTunes (or Finder on macOS Catalina and later)
2. Press and release Volume Up, then Volume Down
3. Hold the Side button until the screen goes black
4. While still holding the Side button, press and hold Volume Down for 5 seconds
5. Release the Side button, but keep holding Volume Down until iTunes/Finder says it has detected a device in recovery mode

Now, restore your device through iTunes/Finder and test charging again afterward.

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Why Your iPhone Stops Charging at 80%

This is normal—and it’s actually a good thing.

Apple designed the iPhone 8 Plus to pause charging at 80% if it gets too warm. This protects the battery and extends its lifespan. It will resume charging once the temperature drops.

To help:

• Move your phone to a cooler location
• Remove any heavy case during charging

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If You See “Accessory Not Supported”

Here’s what might be wrong:

• Your charger is not Apple-certified
• Your Lightning port is dirty or damaged
• Your iPhone software needs updating

What to do:

• Try a different Apple-certified cable or charger
• Clean the Lightning port
• Restart your phone and try again

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Still Not Charging? Contact Apple Support

If your iPhone 8 Plus still refuses to charge:

• Call Apple Support
• Visit an Apple Store or authorized service provider

And don’t forget—charging accessories are covered under warranty, so you may be eligible for a free replacement.