Charging port that won't charge or charges badly
The most common cause of a temperamental charging port isn't an electronic fault but a mechanical blockage: dust, pocket lint or oxidation from moisture stop the pins from making proper contact with the cable.
FAQ by brand
Apple (iPhone)
“Liquid detected” stops charging - what should I do?
It's a software protection that deliberately blocks charging to avoid a short circuit. Let the port dry completely in open air (never with a heat source) before trying again - forcing a charge during the alert can make the damage worse.
The phone charges, but much more slowly than before - is the port to blame?
Usually not - a non-certified or worn cable or charger is the first cause of slow charging. Testing with a different certified cable and adapter isolates the real problem before suspecting the port.
Samsung, Xiaomi, Huawei (USB-C)
The cable sits loosely or wobbles in the port - is that normal?
No - a USB-C connector in good condition holds the cable firmly. Play or unusual movement signals mechanical wear of the pins that's best dealt with before it gets worse and damages the cable too.
The phone only charges with the cable held in one exact position?
That's almost always a partly damaged or dirty connector rather than a faulty cable - a professional port cleaning solves most of these cases.
Other brands
Can I clean the port myself?
A puff of dry air and great care can help, but avoid any metal object that could bend a pin or cause a short circuit. When in doubt, a professional cleaning is safer than a home attempt.
Your problem isn't listed here?
Every device is different - ask for a free diagnosis or describe the problem directly on WhatsApp.