How to Fix Decreasing Battery While Charging an iPhone

It can be stressful when your iPhone doesn’t charge properly, charges too slowly, decreases battery while plugged in, or even stops charging at 80%. This problem can happen because of a weak charger, background apps using too much power, dust in the charging port, outdated software, or poor battery health. The good news is that there are several simple steps to fix a decreasing battery while charging an iPhone.

Start by checking your charger and cable, cleaning the charging port, and closing unused apps. You can then restart your iPhone, update iOS, turn off extra features while charging, and check your battery health. Moreover, you can check background apps, try airplane mode, and disable all unnecessary features. If these don’t work, the next step is to visit a trusted repair service.

What to Do If Your iPhone Battery is Decreasing While Charging?

Here are the quick troubleshooting steps to try:

1. Use the Right Power Source

The first thing to check is your power source. iPhones need a steady power supply to charge properly. The most reliable option is to plug your device into a wall outlet. Charging from a laptop, car charger, or weak power adapter may not give enough power, especially if you use your iPhone while charging. If your iPhone isn’t charging, switch to a wall outlet and use a certified Apple adapter. Trying a different outlet is also helpful if the socket is faulty.

2. Restart Your iPhone

Sometimes, a small software glitch can stop your iPhone from charging. Restarting clears temporary bugs and gives your phone a fresh start. Hold down the power button (and volume button on newer iPhones) to restart until you see the slider. Simply slide your phone to turn it off, wait a few seconds, and then turn it back on. Many users find that after restarting, their iPhone begins charging normally again. It’s a quick step, but it often works to fix minor issues.

3. Inspect Your Charging Cable and Adapter

Your charging cable and adapter play a big role in powering your iPhone. Over time, cables can bend, fray, or break inside, even if they look fine outside. Adapters may also stop working due to damaged pins. Carefully inspect your Lightning cable and USB adapter for any signs of wear or damage. If you find issues, replace them with genuine Apple-certified accessories. Using cheap or uncertified products can cause charging problems and harm your device.

4. Check the Charging Port for Dust or Debris

Another common issue is dirt or lint inside the charging port. Since iPhones are often carried in pockets and bags, the port can collect dust that blocks the connection. Look closely at the bottom of your iPhone. If you see any debris, gently clean it using a soft, dry cloth, a toothpick, or a brush. Avoid damaging the delicate connectors inside. Once the port is clean, plug your cable firmly into the device. A clear connection helps your iPhone charge smoothly.

5. Ensure Firm Connections

Sometimes the issue is as simple as a loose connection. Ensure your charging cable and adapter are securely plugged into your iPhone. Then check that the adapter is firmly placed into the wall socket. A half-connected charger will not send enough power to your iPhone. Try a different cable or adapter to confirm whether the accessories work properly. Small details like this can distinguish between a dead battery and a fully charged phone.

6. Give It 30 Minutes to Charge

If your iPhone battery is fully drained, it might take time before the charging symbol appears on the screen. Leave your iPhone connected to the charger for at least 30 minutes without using it. Sometimes people unplug too early, thinking it’s not charging, when the battery needs extra time to start up. If the screen stays black, keep waiting. After half an hour, try turning it on again. This step is especially important for older iPhones or those with low battery health.

7. Keep an Eye on Background Apps

Even when you’re not using an app, it runs in the background and consumes battery and processing power. Social media, location-based apps, and games are common culprits. To check, go to Settings > Battery to see which apps drain energy the most. If you notice one using too much power, close it or uninstall it if it’s unnecessary. Reducing background usage helps your iPhone receive more power from the charger, preventing the battery from draining while plugged in.

8. Turn on Airplane Mode

Turning on Airplane Mode is a smart trick if you want your iPhone to charge faster. Airplane Mode disables Wi-Fi, Bluetooth, and cellular signals, which drain battery while charging. To enable it, swipe to open Control Center and tap the airplane icon. This way, your iPhone uses almost no power during charging, allowing the battery to increase steadily. Remember, you won’t receive calls or texts while Airplane Mode is on, but it’s helpful when you need a quick charge.

9. Disable Unnecessary Features

Many features on the iPhone, such as location services, background app refresh, and automatic updates, can use power even while charging. If your battery keeps dropping, it’s worth turning off these extras. Go to Settings > Privacy > Location Services to turn off location for apps that don’t need it. You can also disable Background App Refresh under Settings > General. Lowering screen brightness or turning on Auto-Brightness also saves energy. Turning off what you don’t need helps your iPhone charge more efficiently.

10. Try a Force Restart

Apple recommends a force restart if your iPhone still won’t charge after 30 minutes. This resets the system without erasing data and can fix deeper software problems.

• iPhone 8 and newer: Press and let go of the Volume Up button quickly, then the Volume Down button. Hold down the Side button until you see the Apple logo.
• iPhone 7 series: Hold down the Volume Down and Side (or Top) buttons simultaneously until the Apple logo appears.
• iPhone 6s and older: Hold the Home and Side (or Top) buttons together until the Apple logo appears.

After restarting, let your iPhone charge for another 30 minutes to see if the problem is fixed.

Conclusion

When your iPhone doesn’t charge, the problem may be as simple as a loose connection, a dirty port, or a bad cable. You can often fix the issue at home by following Apple’s recommended steps like checking your charger, cleaning the port, restarting, and giving the phone enough time to charge. But if your iPhone still refuses to charge, it’s time to get expert help. Don’t wait too long, visit Cell N Tech for reliable iPhone repair services and get your device back to normal.