Phone won’t charge anymore? Don’t replace the battery first. Check the cable, charger, clean the charging port, and note bad-port signs (must hold the cable, charges a few seconds, drains on the wire). Then you’ll know if it’s dirt, the port or the board.
1. Quick tests (2 minutes)
- Try another cable and charger (ideally original / certified). One bad cable fools the diagnosis.
- Try a wall outlet, not only a PC USB port — some PC ports supply weak current.
- If you have wireless (or MagSafe): if wireless works, the issue is more likely cable / port, not necessarily the battery.
- Note: charges only one way, needs the cable held, socket gets hot, “Accessory not supported” / “Liquid Detected”.
2. Phone port — lint and debris
- With the phone off (ideally) and unplugged: look into the port with good light (USB-C or Lightning).
- Lint, dust and grit lift the plug — it never fully seats; it feels like you must press hard.
- Gentle clean: wooden / plastic pick or a dry soft brush. Pull debris out — don’t push it deeper.
- Short bursts of compressed air from a distance — no liquids or oils into the port.
- Don’t use metal needles, knives or screwdrivers: you can scratch contacts or short them.
- Don’t pour alcohol / “contact cleaner” into the port without experience — liquid can reach the board.
3. Cable tip — dirt and contacts
- Inspect the plug that goes into the phone: lint, oxidation (green/black spots), bent pins (USB-C).
- Wipe with a dry cloth; light oxidation sometimes responds to a cloth barely damp with isopropyl alcohol — dry fully before plugging in.
- If the plug is melted, deformed or smells burnt — discard the cable; it can damage the phone’s port.
4. Cable: bends, frays, heat
- Check near the plug (daily bend zone): cracked jacket, visible wires, soft “knots”.
- If the cable gets very hot, sparks, or only charges in one position — stop using it; risk to port and battery.
- Don’t bend it at 90° in a case / pocket; use a short desk cable if you always break the same spot.
- Cheap no-name cables can charge slowly or intermittently even on a healthy phone.
5. “Liquid Detected” / wet port
- Don’t force the cable. Leave the phone dry, port down, for a few hours; try again.
- If the message returns often or there was liquid contact — see also the “phone after liquid” guide; oxidation can start even while charging still works.
Still having the problem?
Tell us the model and what you have tried. We will continue from the issue in this guide.
FAQ6
Why only a few seconds of charging?
Usually unstable contact or protection stopping current. Cleaning + another cable helps many cases; if not — shop diagnostics.
Why drain instead of charge?
Cable/charger under-delivers, partial short in port, degraded battery, or high draw on weak charger (PC USB).
Does cleaning the port help?
Yes, often — lint blocks contact. Gentle wood/plastic pick, no sharp metal. If still unstable, port may be worn or corroded.
Any USB-C cable?
For a quick test yes; cheap cables may charge slowly. Use known-good cable + enough wattage for diagnosis.
Wireless works but cable doesn't?
Wireless circuit is separate. Issue is almost certainly port / cable / flex.
When to visit NEXX GSM
- Port is loose, cable falls out, only one USB-C orientation works.
- After cleaning it still won’t charge, or the socket area gets very hot.
- You suspect a short, a drop on the bottom edge, or a liquid history.
We check the port, charging flex, charging IC and battery. Estimate on request; exact cost after inspection.