You’re completely right. But it is incredibly fucking hilarious to me that, out of context, your question to an assumed layperson is that they should know how nuclear power (a very complex subject that I (a power plant operator who worked at a nuclear power plant in various contracting capacities for about ten years) cannot fully explain) works.
Idk, it’s like overhearing from a table over in a restaurant “how do you think brain surgery works?” How the fuck should anybody without intense familiarity with such a niche subject know that?
But yes, you are absolutely right. All you have to do is google “do nuclear subs have batteries” lmao. We all could have that level of knowledge with two seconds of “work”.
Worth noting that Nuke subs have batteries but Carriers do not use batteries for auxiliary power. They have 2 independent plants (Enterprise had more, but that’s decommissioned now), and use diesel generators as a backup. That’s not to say there’s no batteries on a carrier, but not like a ship-wide battery system. But obviously that has nothing to do with “how heavy” batteries are, so I guess this is all beside the point.
