hoom wrote:Semi-OT but since Li-ion batteries have been discussed: https://bmpd.livejournal.com/3366556.html
Japan launched the first Li-ion battery equipped sub
Says it gets about the same underwater endurance as AIP but unlike AIP can recharge with the diesels (& quicker charge than lead-acid batteries).
Costs about $100mil more than the conventional version.
Li-Ion are obviously superior to lead acid batteries in performance but they are not safe until they make them solid state.