Chargers may also overheat, especially if they are damaged, poorly made, counterfeit, or connected to overloaded or older outlets. In rare cases, this can cause melted plastic, sparks, short circuits, or even an electrical fire.
Keeping a charger powered continuously may gradually wear down its internal parts, reducing charging speed and shortening its lifespan. Wasted standby electricity also increases energy demand and its environmental impact.
For safer use, unplug chargers when they are not needed, choose certified products, inspect them for damage, and avoid overcrowding outlets. Keep chargers dry and away from heat, and replace any charger that becomes unusually hot, cracked, or unreliable.
