How to Fix a Phone That Won't Charge

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 charging system — it bends, gets stepped on, and frays where it connects to the plug or the phone. Before you assume the phone is broken, swap in a different cable and adapter you know works.

If you don't have a spare cable at home, borrow one from a friend or family member with the same phone type. Plug it in and wait five minutes. If the phone charges normally with the borrowed cable, your original cable is the problem and you need to replace it. If it still won't charge, move to the next step.

Key Takeaways

The charging cable fails more often than the phone itself, so test with a different cable and adapter before assuming hardware damage.
Lint and debris in the charging port block the connection — use a flashlight to look inside, then gently clean it with a dry toothpick or wooden stick, never metal.
Restart your phone completely (power off and back on) to clear software problems that can prevent charging from starting.
If the phone charges slowly or only when held at an angle, the port is damaged and needs professional repair or replacement.

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 properly, so power can't flow to the battery. Look at the port with a flashlight — if you see fuzz or dark material inside, that's the problem.

Use a dry toothpick or wooden stick to gently scrape the inside of the port. Work slowly and don't force anything. Never use metal (like a paperclip) because metal can short the contacts and damage the phone permanently. After cleaning, blow gently into the port to remove loose debris, then try charging again with your original cable.

Restart your phone completely

Software glitches can prevent the charging system from recognizing that a cable is plugged in, even though the hardware is fine. A full restart clears these temporary problems. Power off your phone completely — don't just lock the screen — then wait 30 seconds and turn it back on.

Once it boots up, plug in the cable again. You should see a charging icon appear on the screen within a few seconds. If the phone charges normally after the restart, the problem was a software hiccup and you're done. If it still won't charge, the issue is physical.

Check for water damage or physical damage

If your phone has been dropped, sat on, or exposed to water, the charging port or internal connections may be damaged. Look at the charging port opening — if you see corrosion (green or white crusty material), the phone has water damage and the port needs professional repair.

If the phone charges only when you hold the cable at a specific angle, or charges very slowly, the port contacts are bent or worn. This also requires professional repair. Most phone repair shops can replace the charging port for $50 to $150 depending on the phone model, which is usually cheaper than replacing the entire phone.

Try a wireless charger if your phone supports it

If your phone has wireless charging built in, a wireless charger can tell you whether the problem is the port or the internal charging system. Place the phone on a wireless charging pad — if it charges wirelessly but not with a cable, the port is definitely damaged and needs repair.

If the phone won't charge wirelessly either, the battery or charging circuit inside the phone may be failing. This is a more serious hardware problem that requires professional diagnosis. Take the phone to the manufacturer's service center or a certified repair shop.

Know when to replace the battery

If the phone charges but the battery drains extremely fast, or if the phone shuts down at 20 percent battery even though it's not actually dead, the battery itself may be failing. Batteries degrade over time and lose capacity — this is normal wear, not a defect.

Most phones can have the battery replaced for $50 to $100 at an authorized service center. This is much cheaper than a new phone and often restores normal charging and runtime. Check the manufacturer's website to find an authorized repair location near you.

When to seek professional repair

If you've tested with a different cable, cleaned the port, restarted the phone, and it still won't charge, the problem is inside the phone and requires professional diagnosis. Take it to an authorized service center for your phone brand — Apple Stores for iPhones, Samsung service centers for Samsung phones, and so on.

Bring the phone and your original cable. Tell the technician exactly what you've already tried. They can test the charging circuit and battery with specialized equipment and tell you whether repair or replacement is the right choice. Many repairs take one to three days.

Frequently Asked Questions

Can I use any USB cable to charge my phone?

Not all cables work with all phones. iPhones use Lightning or USB-C depending on the model, Android phones use USB-C or Micro-USB, and older devices use proprietary connectors. The cable must match your phone's port type. Using the wrong connector can damage both the cable and the port.

Is it safe to charge my phone overnight?

Modern phones stop charging once the battery reaches 100 percent, so leaving it plugged in overnight won't damage the battery. However, keeping the battery at 100 percent constantly does cause very gradual degradation over months. If you charge overnight regularly, your battery may lose capacity slightly faster than if you unplugged at 100 percent.

Why does my phone charge slowly?

Slow charging usually means the cable or port is partially damaged, or you're using a low-power adapter. Try a different cable and adapter first. If the phone still charges slowly, the port contacts may be worn and need professional cleaning or replacement. Background apps running during charging can also slow it down — restart the phone before plugging in.

What's the difference between fast charging and regular charging?

Fast chargers deliver more power (measured in watts) to the battery, so the phone reaches 100 percent in less time. Not all phones support fast charging — check your phone's manual to see what wattage it accepts. Using a fast charger on a phone that doesn't support it won't damage anything, but it won't charge faster either.

Can I charge my phone with a computer USB port?

Yes, but it will charge very slowly because computer USB ports deliver less power than wall adapters. This works in an emergency, but for daily charging use a proper power adapter. Charging from a computer also keeps your phone awake and can drain the battery if the computer goes to sleep.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.