Start with the cable and power adapter

Most phones that won't charge have a problem with the cable or adapter, not the phone itself. The cable is the weakest part of the system — it bends, gets stepped on, and frays where it enters the connector. Before you assume the phone is broken, test a different cable and adapter.

If you have another phone of the same type, borrow its cable and plug it into your phone. If that cable works, your original cable is damaged and needs replacing. If the borrowed cable also doesn't work, try a different power adapter — the brick that plugs into the wall. If a different adapter charges your phone, your original adapter has failed.

Buy replacements from the phone maker or a retailer you trust. Cheap third-party cables can damage the charging port over time, and some counterfeit adapters can overheat or catch fire. The cost of a genuine cable or adapter is worth the safety.

Key Takeaways

  • Test with a different cable and adapter before assuming your phone is broken, since cables fail much more often than phones do.
  • Lint and debris in the charging port block the connection — use a dry toothpick or a small flashlight to look inside and gently clear it.
  • Restart your phone in safe mode to rule out a software problem that is preventing charging from starting.
  • If the port is physically bent or the phone has been wet, the charging circuit may be damaged and the phone may need professional repair.
  • Genuine cables and adapters from the phone maker are safer than cheap replacements and last longer.

Clean the charging port

Lint, dust, and pocket debris collect inside the charging port over months of use. This buildup blocks the metal contacts from touching, so power cannot flow even when the cable is plugged in. Look at the port with a flashlight — if you see white or gray fuzz, that is the problem.

Turn off your phone completely. Use a dry toothpick, a wooden cocktail stick, or a plastic dental pick to gently scrape the inside of the port. Work slowly and do not force anything. The goal is to loosen and remove the lint without damaging the tiny metal pins inside. If you have a can of compressed air, a short burst can blow out loose debris, but do not use a vacuum cleaner — the static electricity can damage the phone.

Do not use water, rubbing alcohol, or any liquid to clean the port. Moisture inside the port can cause corrosion or short circuits. Once the port looks clean, plug in your cable and see if charging starts.

Check for water damage or physical damage

If your phone has been dropped, sat on, or exposed to water or sweat, the charging port or the charging circuit inside the phone may be damaged. Water damage is not always obvious — the phone might work fine for calls and texts but refuse to charge.

Look at the charging port opening. If the metal contacts inside are green or white (oxidation), or if the port looks bent or pushed inward, physical or water damage is likely. Some phones have a moisture indicator — a small white or colored dot inside the charging port or under the battery — that turns pink or red when wet. If the indicator is discolored, water has reached the inside of the phone.

If you suspect water damage, turn off the phone and do not plug it in. Let it dry in a warm, dry place for at least 48 hours before trying to charge it again. If the phone has been in salt water or dirty water, the damage may be permanent and professional repair may be the only option.

Restart your phone and clear the cache

Sometimes the charging system stops working because of a software glitch — the phone's operating system is not communicating properly with the charging hardware. A restart often fixes this. Turn off your phone completely, wait 10 seconds, and turn it back on.

If a restart does not work, restart in safe mode. On Android, hold the power button, then press and hold "Power off" until a menu appears asking about safe mode — tap "Safe mode." On iPhone, there is no built-in safe mode, but you can force a restart by holding the volume-up button and the power button together until the screen goes black, then release and wait for the Apple logo.

Safe mode disables third-party apps, so if a recently installed app is interfering with charging, the phone will charge in safe mode. If it does, uninstall the app that was installed most recently before the charging problem started. If the phone still will not charge in safe mode, the problem is hardware, not software.

Try a different charging method

If your phone supports wireless charging, place it on a wireless charger to see if it charges that way. Wireless charging uses a different circuit than the charging port, so if wireless charging works but the cable does not, the port or its connection to the charging circuit is damaged.

Some phones also support charging through a computer USB port. Plug the cable into a computer instead of a wall adapter. Computer USB ports deliver power more slowly, so charging will be very slow or may not start at all if the battery is very low, but if it works, you know the cable is fine and the problem is with the adapter or the wall outlet.

Test the wall outlet itself by plugging in a lamp or another device. If the outlet does not work, try a different outlet in another room. A tripped circuit breaker or a failed outlet can look like a charging problem.

Let the battery drain completely, then charge from zero

If your phone's battery is completely dead, the charging system may not recognize that it needs to start charging. This is rare, but it happens. If your phone has been off for days or weeks, the battery may have drained below the minimum voltage the charger recognizes.

Plug the phone in and leave it connected for at least 30 minutes without turning it on. Some phones need 15 to 30 minutes of charging before they have enough power to turn on and show a charging indicator. If the phone still does not respond after 30 minutes, try a different cable and adapter again.

Once the phone does charge and turn on, let it charge fully before using it. A phone that has been completely drained sometimes needs a full charge cycle to stabilize the battery management system.

When to seek professional repair

If you have tested multiple cables and adapters, cleaned the port, restarted the phone, and tried wireless charging or computer charging, and nothing works, the charging circuit inside the phone is likely damaged. This is a hardware failure that requires professional repair.

Contact the phone maker's support line or visit an authorized repair center. Bring the phone and explain what you have already tried. Repair costs vary widely depending on the phone model and the damage — a charging port replacement might cost $50 to $150, while a full logic board replacement could cost much more. Some phones are not worth repairing if they are old, so ask for a cost estimate before authorizing the work.

If the phone is still under warranty, the repair may be covered. Check your purchase receipt or contact the maker to confirm your warranty status.

Frequently Asked Questions

Why does my phone charge slowly even when it does charge?

Slow charging usually means the cable, adapter, or port is partially damaged or dirty. A partially clogged port delivers less power. Try cleaning the port and testing with a different cable and adapter. If the phone charges at normal speed with a different setup, replace the cable or adapter. Slow charging can also happen if you are using the phone while it charges — stop using it and let it charge without the screen on.

Is it safe to use my phone while it is charging?

It is safe to use your phone while charging, but it will charge more slowly because the battery is powering the screen and apps at the same time. The phone may also get warm, which is normal. If the phone gets very hot to the touch, stop using it and unplug it. Excessive heat can damage the battery.

Can I use a different brand's cable to charge my phone?

It depends on the connector type. If the cable has the same connector as your phone — USB-C, Lightning, or Micro-USB — it will physically fit. However, cheap third-party cables may not deliver power correctly or may damage the port over time. Cables from the phone maker or from well-known electronics retailers are safer. Avoid very cheap cables from unknown sellers.

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

Unplug the cable when ready and turn off the phone. Do not try to charge it again for at least 48 hours. Let it dry in a warm, dry place — a windowsill in sunlight or near (not on) a heating vent works well. Do not use a hair dryer or oven, which can damage the phone. After 48 hours, try charging with a cable and adapter you know work on another phone. If it still will not charge, water damage to the charging circuit is likely.

Do I need to buy an expensive fast charger?

No. A standard charger that came with your phone or a basic replacement will charge your phone fully, just more slowly. Fast chargers are optional and cost more. They can charge some phones in 30 minutes instead of an hour, but they also generate more heat, which can wear out the battery faster over years of use. A standard charger is fine for most people.