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  1. The Japanese submarine Hakuryu visits Guam last year. The Soryu-class boat was built with air-independent propulsion technology, which Japan plans to replace with Lithium-ion batteries for the remaining four boats in the 10-ship class.

    Japan To Make Major Switch on Sub Propulsion

    • October 1, 2014

    Japan has decided to power its new batch of Soryu-class submarines with Lithium-ion batteries instead of air-independent propulsion (AIP) technology ó a move that could raise eyebrows after similar types batteries were faulted for fires aboard the Boeing

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