Most charger problems come from the cable, not the power brick

When your charger stops working, the issue is usually a damaged cable rather than a broken power adapter. Cables bend, get pinched, and fray from daily use — especially near the connector where the cable enters the plug or your device. A frayed or bent cable can interrupt the flow of electricity even if the power brick itself is fine.

The second most common culprit is a dirty charging port on your device. Lint, dust, and debris accumulate inside the port where the cable connects, creating a barrier between the metal contacts. This prevents electricity from reaching your device's battery, even though the charger is working correctly. You can often fix this by gently cleaning the port with a dry toothpick or a small brush.

Less often, the problem is the power brick — the larger rectangular adapter that plugs into the wall. Power bricks can fail if they overheat, get wet, or straightforward wear out after years of use. But before you assume the brick is dead, test the cable and port first, since those are the more likely culprits.

Key Takeaways

  • Inspect your charging cable for visible damage like fraying, kinks, or exposed wires, especially near the connectors on both ends.
  • Clean your device's charging port with a dry toothpick or small brush to remove lint and dust that blocks electrical contact.
  • Test whether the power brick itself works by plugging in a different device that uses the same connector type, if you have one available.
  • Avoid wrapping cables tightly around chargers or bending them sharply, since this damage accumulates and eventually breaks the internal wires.
  • If your charger gets wet, let it dry completely for at least 24 hours before using it, since moisture can cause electrical shorts.

How to check if the cable is the problem

Look at the entire length of your charging cable, paying special attention to the areas near both connectors. Fraying, visible cracks, kinks that won't straighten out, or exposed copper wires inside the cable all mean the cable is damaged and should not be used. Even small damage can cause the charger to work intermittently — it might charge when you hold the cable at a certain angle but fail when you move it.

If the cable looks fine on the outside, try bending it gently along its length while your device is plugged in and charging. If the charging indicator flickers on and off as you bend it, the internal wires are broken even though the outer covering looks intact. This is a sign the cable needs to be replaced.

A damaged cable is a safety hazard. Do not continue using it, since a broken wire can cause electrical shock or overheat the charger. Replace it with a new cable that matches your device's connector type — USB-C, Lightning, Micro-USB, or whatever your device uses.

How to clean a charging port

Unplug your device and power it off completely before you start. Use a dry toothpick, wooden skewer, or a small stiff brush to gently scrape inside the charging port. Work slowly and carefully — you are trying to dislodge lint and dust, not damage the metal contacts inside the port.

Do not use liquid cleaners, compressed air, or metal tools. Liquid can seep into your device and cause damage. Compressed air can push debris deeper into the port instead of removing it. Metal tools can scratch or bend the delicate metal contacts that electricity flows through.

After cleaning, wait a few minutes and then plug your charger back in. If the device starts charging, the port was the problem. If it still does not charge, move on to testing the power brick itself.

How to test if the power brick is broken

If you have another device that uses the same type of connector, try charging it with your power brick. For example, if your phone uses USB-C and you have a tablet that also uses USB-C, plug the tablet into your charger and see if it charges. If the other device charges normally, your power brick is working — the problem is with your phone's cable or port.

If you do not have another device to test with, look at the power brick itself. Feel it with your hand — it should be warm but not hot. If it is extremely hot to the touch, unplug it when ready and let it cool down. Overheating can damage the internal components. If it smells burnt or has visible scorch marks, the brick has failed and should be replaced.

Some power bricks have a small LED light that turns on when they are plugged in. If that light does not come on, the brick may have lost power. Try plugging it into a different outlet to rule out a problem with the wall socket itself.

Understanding what "fast charging" means for charger problems

Fast chargers deliver more electrical power than standard chargers, which is why they heat up more during use. If your device supports fast charging but you are using a standard charger instead, your device will charge more slowly — but this is not a malfunction. The charger is working correctly; it is just delivering less power.

Conversely, if you use a fast charger with a device that only supports standard charging, the device's internal circuitry prevents overcharging by limiting how much power it accepts. Again, this is normal and safe — the charger is not broken.

However, if your fast charger is not delivering fast charging speeds even though your device supports it, the cable may be the issue. Not all cables can handle fast charging, even if they fit the connector. A damaged cable will definitely not support fast charging, even if it still charges slowly.

Why chargers fail over time

Cables wear out because they bend repeatedly at the same spots. Every time you wrap the cable around your charger, coil it in your bag, or bend it to reach an outlet, you stress the internal wires. After months or years of this, the wires inside break, and the cable stops working.

Power bricks fail when they overheat. If your charger is in a hot environment, covered by blankets, or plugged into an outlet in direct sunlight, it can overheat and damage the internal circuitry. Moisture is another common cause — if your charger gets wet or is used in a humid bathroom, water can corrode the internal components.

The lifespan of a charger depends on how you treat it. A cable that is gently coiled and stored in a cool, dry place can last for years. A cable that is constantly bent, twisted, and thrown into bags will fail within months.

When to replace your charger versus when to repair it

If the cable is damaged, replacement is your only option. Cables cannot be safely repaired — even if you tape or solder a broken wire back together, the repair will not be reliable and creates a safety hazard. A new cable costs between $15 and $40 depending on your device type.

If the power brick is broken, replacement is also the safest choice. Repairing a power brick requires opening it up and working with high-voltage components, which is dangerous unless you have electrical training. A replacement power brick typically costs $20 to $60.

If the charging port on your device is damaged, repair is more expensive — usually $50 to $150 depending on your device — but it is sometimes worth it if your device is otherwise in good condition. Before paying for a port repair, confirm that the port is actually the problem by testing with a different cable and cleaning it thoroughly.

Frequently Asked Questions

Why does my charger only work when I hold the cable at a certain angle?

The internal wires in your cable are partially broken. When you hold the cable at a specific angle, you are making contact between the broken pieces, which allows electricity to flow. This is a temporary fix and the cable will eventually stop working completely. Replace the cable to avoid losing power at a critical moment.

Can I use a different brand's charger with my device?

If the connector type matches — USB-C to USB-C, for example — a different brand's charger will work. However, check that the power output (measured in watts) is appropriate for your device. Using a charger with much lower wattage will charge very slowly; using one with much higher wattage can damage your device's battery over time. Your device's manual or the manufacturer's website lists the correct wattage.

Is it safe to use a charger that gets very hot?

Chargers warm up during normal use, but they should not be too hot to touch. If your charger is uncomfortably hot, unplug it and let it cool. Excessive heat can damage the internal components and is a fire hazard. Make sure your charger has air circulation around it and is not covered by blankets or stored in a hot environment.

What should I do if my charger got wet?

Unplug it when ready and do not use it until it is completely dry. Let it sit in a warm, dry place for at least 24 hours. Do not use a hair dryer or oven to speed up drying, since direct heat can damage the components. After it dries, test it carefully before relying on it. If it smells burnt or does not work, replace it.

Why does my device charge slowly even with the original charger?

Slow charging can mean the cable is partially damaged, the charging port is dirty, or your device's battery is aging. It can also mean your device is running many apps in the background while charging, which slows the process. Try cleaning the port, testing with a different cable if you have one, and closing unnecessary apps. If none of these help, the battery itself may need replacement.