Back in February we pointed out that unplugging your cell phone charger when it's not in use could save up to 190 megawatts a day in the US alone.
Today Nokia announced that all of their new devices will alert users to unplug the charger once the battery is full.
Mobile phones sounding a beep and displaying an alert -- "Battery is full, please unplug the charger" -- could save enough electricity to power 85,000 homes annually, Nokia said.