Duracell Powerpack 450... The Duracell Powerpack 450 is a stand~alone source of portable power for AC DC and USB~powered electronics such as a laptop cordless or cell phone GPS lamp portable light small tool and small appliance. Simply connect your devices to the Powerpack 450 and its voice technology automatically tells you the estimated runtime for each device. The Duracell Powerpack 450 is a greatpanion during a power outage. It is a quiet safe indoor power source and a goodplement to a generator. It will operate and charge important electronics so you can stay connected to your family news and weather reports. Make the Duracell Powerpack 450 a part of your vehicle emergency kit. Its voice technology will talk you through how to use its vehicle jump starter and airpressor features which makes these tasks less stressful during an emergency.