A phone plugged in but not charging may be blocked by the outlet, cable, adapter, debris in the port or excessive temperature. Start with external parts and never insert metal into the connector. Stop charging immediately if the battery swells or you notice unusual heat, smell, liquid or sparking.
Quick answer
Try another wall outlet, then a compatible cable and adapter that are known to work. Seat each connector firmly, remove a case that interferes and leave a deeply discharged phone connected for thirty minutes. Restart it. Inspect the port under a light without scraping it and seek authorised service if reliable chargers still fail.
How to isolate a charging failure
Test one component at a time. If another device also fails with the same charger set, suspect the cable or adapter. If the phone works with a second cable, the first cable is the likely cause. Stopping at 80 percent can be intentional battery protection or heat management. A black display can also hide a phone that is actually charging.
| What you see | Check first |
|---|---|
| No icon with several known-good chargers | Port, battery, screen or phone hardware |
| Charging changes when the cable moves | Damaged cable or connector |
| Charging stops near 80 percent | Charge limit or temperature |
| Only wireless charging fails | Alignment, case or incompatible pad |
| Unsupported accessory warning | Damaged or incompatible cable or adapter |
10 checks in the safest order
1. Test the wall outlet
Plug a lamp or another simple device into the same outlet, then try a different wall outlet without a power strip or USB hub. A switched outlet or failing extension lead can make a healthy phone and charger appear broken.
2. Inspect cable and adapter separately
Look for split insulation, bent prongs, loose connectors, burn marks or unusual heat. Do not use damaged accessories. Test one known-good compatible cable and then one adapter so that you can identify the failed component instead of replacing everything.
3. Confirm power and compatibility
Some computer ports and older adapters supply too little power, especially while the screen is active. Use the manufacturer’s recommended specification and a cable rated for the required power. An accessory warning often points to damage, insufficient power or incompatibility.
4. Remove the case and reconnect firmly
A thick or poorly fitted case can stop a plug seating fully or misalign wireless coils. Remove it temporarily, connect the cable directly to the phone and adapter, and wait up to one minute for the battery symbol.
5. Inspect the port without metal tools
Power the phone off and look into the port under a light. Compressed lint can block contact. Do not add liquid or insert a pin, paperclip or other metal object. Follow the manufacturer’s cleaning instructions or ask a technician.
6. Leave it charging for thirty minutes
A deeply discharged battery may show nothing for several minutes. Leave the phone on a reliable charger for at least thirty minutes without repeatedly trying to start it. A red light or empty battery icon can simply mean that more charging time is required.
7. Restart using the correct procedure
If the screen responds, perform a normal restart. For a frozen screen, use only the official button sequence for that model because Android and iPhone procedures differ. Restarting cannot repair a physically damaged port, cable or battery.
8. Let the phone cool naturally
Software can slow or stop charging when the device is too warm. Unplug it, remove the case and place it in a dry, room-temperature location away from sunlight. Never use a refrigerator or freezer because condensation can cause damage.
9. Check charge limits and wireless alignment
Some phones intentionally pause near 80 percent or use optimised charging. Read the battery settings before treating this as failure. For wireless charging, centre the coils, remove metal objects and use an officially compatible charger.
10. Arrange a battery and port diagnosis
If several reliable outlets, cables and adapters fail, the port, battery, display or charging circuit may need service. Back up data while the phone still turns on and contact the manufacturer or authorised repair provider without opening the battery yourself.
Stop immediately if you see these signs
Disconnect the phone if it swells, smells unusual, becomes extremely hot, shows liquid damage or the cable sparks. Do not press or puncture a deformed battery. Move it away from flammable material when safe and follow the manufacturer’s instructions for professional assessment.
Frequently asked questions
Why does charging stop at 80 percent?
A configured charge limit, optimised charging or temperature protection may pause it. Check settings and let the phone cool.
Can I clean the port with a needle?
No. Metal can bend contacts or cause a short circuit. Use the manufacturer’s method or professional cleaning.
Can a data cable still be bad at charging?
Yes. It may transfer data while power delivery is weak or unstable. Test a known-good compatible charging cable.
Official sources
- Google Android: device will not charge or turn on
- Apple: iPhone will not charge
- Apple: wirelessly charge an iPhone
Checked on August 24, 2026. Restart procedures and power requirements vary by model.
Does the phone become hot while charging?
Check the causes of phone overheating before continuing to charge it.