RELiON Legacy Series – deep cycle lithium batteries are an upgrade from lead batteries they are a higher return on your investment. RELiON’s Legacy Series batteries are the perfect drop-in replacements for Group 24, 27, 31 and 8D AGM, GEL or lead-acid batteries. They are the perfect combination of size and capacity to fit many applications including RV, marine, solar energy systems, and more. RELiON lithium batteries provide more energy for high consumption than traditional lead-acid batteries. The also offer ultra-fast charging and discharging, high efficiency, and longer life cycle – plus no maintenance!