In an effort to help the world save a little more energy, a group of mobile manufacturers has launched a common energy rating system for phone chargers. Developed by LG, Motorola, Nokia, Samsung Electronics and Sony Ericsson, this electronic rating system makes it easier for customers to choose the one who saves the most energy.

Most people are unaware that about two thirds of the energy used by mobile devices is wasted by leaving your phone charger plugged into the wall. Many manufactures are taking the time to address this issue and create more energy efficient chargers for their handsets. The new rating system shows just how much energy is used when a charger is left plugged into the socket after charging is completed.

If the more than three billion people who own mobile phones today decide to switch to a four or five star charger, the energy saved could power two medium sized power plants. Customers who are interested in finding out the rating of their current charger can log on to any of the above companies websites and view the ratings. Many major producers have begun introducing visual alerts to their devices to remind consumers to unplug the charger when charging is complete.

[Via Nokia]