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Here's what the DoD techincal requirements stated:
"The complete power system must weigh 4kg or less and provide a minimum of 1920Whr. The power system must operate continuously for 96 hours. During the 96 hours of operation the system must operate: (1) continuously (i.e., 24 hours a day); (2) at partial power; (3) for a number of periods of high power of up to 200W for 5 min; (4) in a non-air breathing mode in a sealed container for a time to be determined; (5) be attitude or vertical orientation and motion independent; (6) provide output voltages of 14V and 28V. The system must attach to a vest and operate while worn. The government will provide connectors for the equipment on the course with additional cables, outlets, etc."
Thanks to Gizmodo for the report.