Here is a link to a description of a 1216AH 4P4S battery that Stan assembled for use on Sally and Stan's powerboat SARISSA in 2024 LFP-battery-for-Sarissa     Below there are links to summary notes and schematics describing the LiFePO4 (aka LFP) battery that Stan assembled for use on Sally and Stan's Cal 40 Illusion. LFP battery Stan Honey notes Schematic of LFP battery and BMS schematic of Illusion's electrical system