The most common reasons your phone stops charging

Your phone won't charge because of one of four things: the cable or adapter is broken, the charging port is blocked or damaged, the battery itself has failed, or the phone's software is preventing it from recognizing the charger. Most of the time it is the cable. The second most common culprit is lint or corrosion inside the charging port. You can test and fix both of these yourself in minutes.

Less often, the battery has reached the end of its lifespan and no longer holds a charge — this happens after 500 to 1,000 full charge cycles, depending on the phone model and how you have used it. Rarely, the charging circuit inside the phone has failed, which requires professional repair or replacement.

Key Takeaways

  • Try a different cable and power adapter first, since the cable fails more often than any other component.
  • Clean the charging port with a dry toothpick or soft brush to remove lint, dust, or corrosion that blocks the connection.
  • Restart your phone in Safe Mode to rule out a software problem preventing the charger from being recognized.
  • If the phone is more than three years old and the battery drains in hours, the battery itself may have worn out and need replacement.
  • Avoid fast chargers and keep your phone cool while charging to extend battery lifespan and prevent future problems.

Test with a different cable and adapter

Before you do anything else, borrow a cable and power adapter you know work. Use them with your phone. If your phone charges with the borrowed cable and adapter, your original ones are the problem — buy replacements. If it still does not charge, move to the next step.

When you buy a replacement cable, buy the type that came with your phone originally. An iPhone needs a Lightning or USB-C cable depending on the model year. An Android phone needs USB-C or Micro-USB. Using the wrong type will not damage the phone, but it will not charge it either. Check your phone's manual or search the model number online if you are unsure which type you have.

Clean the charging port

Lint, dust, and corrosion build up inside the charging port over time and prevent the charger from making a solid connection. You can see this as a white, green, or black coating inside the port, or you may see nothing but still have a loose connection.

Turn off your phone. Take a dry toothpick or a soft-bristled toothbrush and gently scrape the inside of the charging port. Work slowly and do not force anything — the pins inside are fragile. Brush out any debris. If you see corrosion (a white or green coating), dampen the toothpick slightly with rubbing alcohol and scrub the corroded area, then let it dry for five minutes before plugging in the charger.

Do not use water, do not use compressed air (the pressure can damage the pins), and do not insert anything metal. After cleaning, plug in your charger and see if it works. If the port is physically damaged — if the pins are bent or broken — the phone will need professional repair.

Restart your phone in Safe Mode

Sometimes a recently installed app or a software glitch prevents your phone from recognizing the charger. Restarting in Safe Mode disables all third-party apps and lets you test whether the charger works without them.

On an iPhone, hold the power button and either volume button until the power-off slider appears. Release the buttons, then hold the power button again until you see "Loading Safe Mode" at the top of the screen. On an Android phone, hold the power button until the power menu appears, then press and hold "Power off" until a "Safe Mode" option appears. Tap it.

Plug in your charger. If your phone charges in Safe Mode, a third-party app is the problem. Restart normally and uninstall any apps you installed in the last few days. If it still does not charge in Safe Mode, the problem is hardware, not software.

Check whether your battery has worn out

Batteries degrade over time. After 500 to 1,000 full charge cycles — roughly two to three years of normal use — a battery loses the ability to hold a charge. If your phone charges but drains to zero in a few hours even when you are not using it, the battery is likely worn out.

On an iPhone, go to Settings, then Battery, then Battery Health & Charging. Look at the "Maximum Capacity" number. If it is below 80 percent, the battery has degraded. On an Android phone, the process varies by manufacturer, but you can usually find it in Settings under Battery or Device Care. Look for a "Battery Health" or "Battery Status" option.

If the maximum capacity is below 50 percent, the battery should be replaced. You can take your phone to the manufacturer's service center or an authorized repair shop. Battery replacement usually costs between $50 and $150 depending on the phone model.

When the charging port or battery needs professional repair

If you have tried a different cable, cleaned the port, restarted in Safe Mode, and the phone still will not charge, the charging circuit inside the phone or the battery itself has failed. This requires professional repair.

Contact the phone's manufacturer — Apple, Samsung, Google, or whoever made it — and ask for an authorized service center near you. You can also take the phone to a third-party repair shop, but authorized centers are more likely to have the exact parts your model needs. Bring your phone and proof of purchase if you have it. Repair costs vary, but expect to pay $100 to $300 for a charging port replacement or $50 to $150 for a battery replacement.

Prevent charging problems in the future

Keep your phone and charger in a dry place. Moisture corrodes the charging port and the pins inside the adapter. If your phone gets wet, let it dry completely before charging — at least 24 hours in a warm, dry room.

Avoid fast chargers if your phone did not come with one. Fast charging generates heat, which degrades the battery faster. Use the charger that came with your phone, or buy a replacement from the manufacturer. Keep your phone cool while charging — do not charge it under a pillow or in direct sunlight, and remove any thick case if the phone gets warm.

Unplug the charger when your phone reaches 100 percent. Leaving it plugged in overnight does not damage modern phones, but it does keep the battery at full capacity for longer, which causes slow degradation over time. If you charge overnight regularly, consider unplugging at 80 percent or using a smart plug that cuts power after a set time.

Frequently Asked Questions

Can I use any USB-C cable with my phone?

Most USB-C cables work with most USB-C phones, but some cheap cables have poor connections or missing safety features. Stick with cables from the phone's manufacturer or from well-known brands like Anker or Belkin. Avoid unmarked cables from dollar stores or gas stations.

Is it safe to charge my phone overnight?

Modern phones stop charging at 100 percent and switch to a trickle charge to prevent overheating, so overnight charging will not damage the phone. However, keeping the battery at full capacity for hours does cause slow degradation. If you charge overnight regularly, unplug when you wake up or use a timer outlet.

Why does my phone charge slowly?

Slow charging usually means the cable or port has a loose connection, or the charger is lower wattage than your phone expects. Clean the port, try a different cable, and check that you are using the correct adapter. If the phone is old, the battery may also be degraded, which slows charging.

What should I do if my phone gets hot while charging?

Unplug it when ready. Heat damages the battery and can be a sign of a short circuit in the charger or phone. Let it cool for 30 minutes, then try charging again with a different cable and adapter. If it gets hot again, stop charging and take it to a repair shop.

Can I replace the battery myself?

Most modern phones have batteries glued inside, making self-replacement difficult and risky. You can damage the screen, the motherboard, or the battery itself. Take it to an authorized service center instead — the cost is low and the repair is may provide.