U-4501 can change the fate of the battle with 37HP 

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********** U-4501 - German Tier X submarine. In October 1943, Walterwerke submitted a proposal to the Kriegsmarine for a submarine featuring a closed-cycle Walter system engine fueled by hydrogen peroxide. This engine was designed to operate effectively whether the submarine was on the surface or submerged. The various sections of the submarine hulls had to be manufactured in different shipyards, and sections for four submarines-designated U-4501 to U-4504-were produced before the war reached its conclusion.
U-4501 was first released on 11 October 2023 with the release of Update 12.9, and is available for in the Armory for 250,000Coal.