The right design is not just magic. When I opened the Chinese drop-in
Lifepo4 batteries I bought three years ago to add an active balancer, I was very surprised to see that they had placed 200Ah LFP 4s cells in the same capacity LA
battery box. The cells only took up 1/3 of the volume in the box. Normally, you can fit the same Ah capacity LFP
battery in the volume reserved for sufficient LA capacity on
boats. Since efficiency increases by 100% with LFP, it may not be a big problem, but; it is much more logical to fit 200-300% more energy in the same space.