Two years ago, a consortium of organisations, part funded by Innovate UK through the Defence Science and Technology Laboratory (DSTL), set out ambitions plans to develop a pressure tolerant battery pack using Lithium Sulfur (Li-S) cells that would revolutionise the way in which Marine Autonomous Systems could be powered at ocean depths. The consortium, headed by Steatite, brought together the world leading expertise of Li -S manufacturer Oxis Energy, underwater vehicle manufacture MSubs, and the academic prowess and cutting edge test facilities of the National Oceanography Centre (NOC). The objective of the project was to develop, build and test a Li -S battery pack capable of powering an autonomous underwater vehicle at depths of up to 6,000m. This depth marks the lowest leve

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