Overview
- Experts on Tuesday recommended unplugging mobile-phone chargers after a charge to cut a small continuous power draw and reduce safety hazards.
- Modern chargers typically draw about 0.1 to 0.5 watts when idle, and that residual load adds up across many devices to meaningfully raise a home’s standby electricity use.
- Keeping a charger plugged in raises its internal temperature and speeds component wear, which shortens the charger’s usable life and can increase stress on device batteries.
- Voltage spikes and grid instability can damage chargers and pass faults to phones, and counterfeit or damaged chargers often lack thermal fuses and proper insulation that prevent overheating and short circuits.
- Practical, low‑cost steps recommended by manufacturers and safety groups are to unplug after charging, use original or certified chargers, inspect cables and plugs for damage, and disconnect chargers during storms or long absences; these steps matter because older transformer-era chargers had fewer protections and risks persist even with modern designs.