Overview
Charging problems are frustrating but usually have simple, free fixes — a dirty port, a worn cable or a software hiccup — long before the battery is to blame. This guide works from the most common no-cost checks to the signs of a genuine hardware issue, so you don't replace parts you don't need to.
Symptoms you might see
- The phone doesn't respond or show a charging icon when plugged in.
- Charging is very slow, or the percentage drops while plugged in.
- You see a 'moisture detected' or 'check charging accessory' alert.
- The cable only charges at a certain angle.
Possible causes
- Lint or debris compacted in the charging port.
- A frayed, damaged or low-quality cable.
- A weak power source such as a low-power USB port.
- A software glitch pausing charging.
- A moisture-detection safety hold, or a worn battery or port.
Step-by-step troubleshooting
Work through these in order — the earliest steps are the safest and fix the most cases.
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Clean the charging port
Power the phone off and shine a light into the port. Gently loosen and lift out lint with a wooden or plastic toothpick. Compacted debris is the number-one cause of 'won't charge' — a clean port often fixes it instantly.
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Swap the cable and adapter
Test with a different, undamaged cable and a wall adapter. Charge from a wall outlet rather than a computer or hub, which deliver less power. A cable that works at only one angle is failing — replace it.
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Try another outlet
Move to a wall socket you know works. Power banks and older USB ports can be too weak to charge reliably, which can look like a phone fault.
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Force restart
A stuck charging process clears with a force restart: hold the power button (or power + volume down) for about 15 seconds until the phone reboots, then plug in again.
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Handle a moisture alert
If you see a 'moisture detected' warning, unplug and let the port air-dry — tap the phone gently with the port facing down. Don't use a hair dryer or poke anything absorbent inside. Wait several hours before charging with a cable; use wireless charging meanwhile if supported.
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Check battery health and update
Install any pending system update, since charging bugs are sometimes patched. If your phone shows battery health or capacity in Settings, a heavily degraded figure explains poor charging and fast drain.
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Get the port or battery serviced
If a clean port, new cable and restart don't help, the charging port or battery may be faulty. A qualified technician can test and replace either part. Keep a backup so you're never caught out.
Before you go further: back up your device to a cloud backup or a computer whenever possible. Steps that could affect your data are clearly flagged — and for suspected hardware faults, a qualified repair professional is the safest next step.
Prevention tips
- Clean the charging port periodically to stop lint building up.
- Use quality cables and replace frayed ones promptly.
- Avoid charging in very hot places, which stresses the battery.
- Don't charge the phone under a pillow or thick bedding.
- Dry the port fully before charging after any exposure to water.
Frequently asked questions
Is it the cable or the phone?
Test the same cable on another device, and test a different cable on your phone. If a known-good cable also fails on your phone, the issue is more likely the port or battery than the cable.
Why does my phone say 'moisture detected' and stop charging?
It's a safety feature that pauses cable charging when it senses water in the port, to prevent corrosion. Unplug, dry the port for several hours, and use wireless charging in the meantime if your phone supports it.
Why is my phone charging so slowly?
Common causes are a weak power source, a low-quality or damaged cable, a dirty port, or heat causing a protective slow-down. Use a proper wall adapter and cable, clean the port, and let the phone cool.
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