The Dart was built using a patented MIT technology known as very high frequency (VHF) conversion that moves power from wall sockets to devices at a much higher frequency and more efficiently than standard chargers. That tough achievement - bring 1000 times faster at switching than conventional laptop charger - means it can both be smaller and remain efficient at charging. The charger also sports a USB port for good measure, which you can use to charge your phone or other small devices.