Check approved power equipment
Confirm the charger and cable meet the laptop's requirements, including USB-C power where applicable. A connector fitting is not enough. Test a known-safe socket; stop using damaged, sparking or unusually hot equipment.
Understand charging limits
A fixed upper charge level can be an intentional battery-care setting. Review the manufacturer's settings before assuming a failed battery. Note whether the machine runs on the charger and whether charge changes over time.
Inspect without probing
Look for visible port or cable damage without inserting tools or forcing the plug. Intermittent charging needs investigation; repeatedly holding a cable at an angle is not a repair.
Plan the diagnosis
Share the model, charger details and exact warnings. Battery, charger, port and charging circuitry need different checks. Verify voltage compatibility from the adapter label rather than assuming every travel charger supports Spanish mains power.
Questions about this guide
What details should I check on the charger?
Compare the charger specification with the laptop manufacturer's requirements, including the connector and supported power delivery. A connector that fits is not proof of compatibility.
Should I keep moving a loose cable until charging starts?
Do not rely on a damaged or overheating connection. Note the symptom and arrange a check; forcing the connector can worsen damage to the cable or charging port.