The main difference between Flitecell Explore, Sport and Nano is the foiling time. Compatibility will range depending on your board size, as some performance models do not accept the largest battery. We generally recommend the Sport battery for riders in Minnesota and Wisconsin because they are not often riding swell or large waves on itermittent power. We are happy to coach you through battery size and quantity based on how you plan to use your eFoil, just give us a call or send a message to the team.