The XM1124 HE HMMWV has the potential for providing this capability on the battlefield. The XM1124 is a TARDEC funded program that converts a standard HMMWV into a series, HE HMMWV. Over the past 5 years, this vehicle has been in the hands of the warfighter and has undergone a significant amount of testing and a number of upgrades. In a joint effort between TARDEC, DRS, and A123 Systems, the vehicle is being upgraded using A123 Nanophosphate™ prismatic cells to provide additional energy storage. This technology shows the potential for providing the energy and power needed for a ruggedized Military Application, while providing a safe, efficient means of energy storage and transfer that can be used in this extremely challenging environment.