Corvus Energy supplies world's first commercial ship with a fuel cell specially adapted for marine use. Following the success of the installation and demonstration of the fuel cell power pack on board, Viking Lady recently entered into a third project phase in which energy storage capability in the form of Corvus’ AT6500 lithium-polymer battery pack is being integrated in the power system. The lithium-polymer battery is comprised of 6.5 kWh modules, has a capacity of 455 kWh, and is capable of delivering up to 4MWh bursts over a short period of time.