Brand New   Nokia Cellular Phone Charger Connects to your PC's power supply peripheral connector to receive stable and efficient power. PC's power supply is usually 100% more efficient than the standard AC/DC adapter The problem with standard AC/DC adapter are:  It is inefficient (waste energy) and It may take up more than one receptacle. The Nokia factory AC/DC adapter taking up too much space that it prevents another power cord to be fully inserted to the receptacle next to it. As long as the AC adapter is plugged in, it draws power -- whetherthe cellular phone is connected or not. As long as the AC adapter is plugged in, it draws power -- whether the cellular phone is connected or not