Lithium-ion battery submarines give a tactical edge to the Japanese Navy

At its second submarine fitted with lithium-ion batteries, Toryu, Japan deployed its new submarine on November 6th. Japan is the first nation to apply this innovation to underwater sports.

What's the big deal, therefore? In our smartphones, laptops and other consumer goods, we know about lithium-ion batteries. The density is lower than that of conventional batteries and can be made smaller and in new forms that are better suited ....