To help you save energy and do your bit for the environment, a group of mobile manufacturers led by Nokia has launched a common energy rating system for chargers. The system makes it easy for you to compare and choose the most energy efficient charger.

How does it work? The new rating system shows you how much energy each charger uses when left plugged in. Ratings range from five stars for the most efficient chargers down to zero stars for the ones using the most energy in the no-load mode.



Why do we need a rating system? Around two thirds of the energy used by mobile devices is lost when chargers are disconnected from the phone but left plugged into the mains. This is what we call the no- load energy consumption. To reduce this, manufacturers are improving the efficiency of their chargers and helping you pick the ones that use the least energy.

The AC-8 is Nokia's most energy efficient charger yet, earning five star rating. This is what the label of the AC-8 charger looks like.




The below table shows you the ratings for Nokia's chargers.

Nokia charger model	Charger energy rating	No-load power consumption
AC-8, AC-10		< 0.03W
AC-3		< 0.15W
AC-6		< 0.15W
AC-4		< 0.3W
AC-5		< 0.3W

Over the last decade Nokia has reduced the amount of no-load energy consumption of the average chargers by 70 per cent and by 90 per cent in our best in class chargers. Our target is to reduce these even more.