Where the charger is placed also matters. Keeping it under pillows, blankets, clothing, or other objects can trap heat and make overheating more likely, so chargers should stay on hard, open surfaces.
Warning signs include unusual heat, buzzing or crackling sounds, a burning smell, discoloration, or damaged cables. If any of these appear, the charger should be unplugged and replaced rather than continuing to use it.
Unplugging chargers when they are not needed also reduces standby electricity use and limits unnecessary electrical stress. A simple habit of checking chargers before bed or leaving home can help reduce avoidable risks.
