HIO Battery (HIOBattery) was formed with a desire to build the best lithium batteries on the planet. Through tireless hours of R&D, we have designed all of our batteries to provide years of trouble free service. We only use the highest quality LiFePo4 cells from the best manufacturers in the world. Every HIO battery contains cells that are meticulously sorted and matched for both capacity and resistance. Trust HIO battery for all of your deep cycle battery needs.