Use the Accu traveling specifically for my HTC Desire HD. Can the internal Accu approximately 3 times full charge. So I'm well looked after during the flight to California in the timber class. I recommend in addition to the trip to "RAIKKO Power Plug Dual USB Charger / Power Supply incl. Car Adapter / Car Charger & World Travel Adapter for USA, Australia and UK" to order with. For me, an indispensable DUO traveling.