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Japan welcomes lithium-ion battery powered submarine into serviceStacy LiberatoreJapan welcomes its first submarine powered by lithium-ion batteries into service that provides longer endurance at speeds up to 20 knots while submerged Ouryu is Japan's first lithium-ion battery powered submarine The vessel was welcome into service last week, but first launched in 2018 It hit speeds of 20 knots while submerged and 13 knots on the surface...Ouryu was christened in June of 2018 (pictured), but was recently brought into service on Thursday, March 5, 2020. The technology requires less maintenance and provides longer endurance at high speeds while submerged compared to lead-acid batteriesRead more at: https://www.dailymail.co.uk/sciencetech/article-8093145/Japan-welcomes-lithium-ion-battery-powered-submarine-service.html?ito=social-twitter_mailonline
I'm not sure if having the 'Rising Sun' emblem is acceptable. I think not actually, by those they conquered in WWII.