A charging device with a USB interface. The AC power adapter receives external AC power. The car lighter adapter receives external DC power provided by a DC power output terminal of a car. The battery pack receives another external DC power provided by batteries. The voltage converter with an AC-to-DC...http://www.google.fr/patents/US20040073820?utm_source=gb-gplus-shareBrevet US20040073820 - Charging device with output interface of universal serial bus
Charging device with output interface of universal serial bus
