Nokia phones to alert users to save energy
Your mobile phone could soon be prompting you to save energy by unplugging the phone's charger when the battery is full, an initiative Nokia said on Thursday it would roll out across its device range.
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.

Nokia said the unplug alerts are set to first appear on its 1200, 1208 and 1650 phone models.