The iGo Green Laptop Wall Charger with 2.1A USB Port features patented iGo Green Technology, which automatically reduces wasted standby power (vampire power) by up to 85%. This power-saving benefit makes this charger one of the most environmentally friendly ways to power up your laptop, even on the go. Weighing less than a pound, the iGo Green Laptop Wall Charger works from any standard wall outlet and includes tips for many popular laptops - and can also charge USB mobile devices with its USB power port (USB cables and tips required, not included).