Upgrading Your RV house battery bank to Lithium Deep Cycle Batteries. It's hard to beat a Lithium Battery Company lithium iron phosphate (LiFePO4) battery when they deliver everything you need to support life on the road and off-the-grid. Unlike traditional lead-acid batteries, our deep cycle RV batteries will charge at 100% efficiency and with lighting fast charging you will be spending less time charging batteries and more time camping. Replace your recreational vehicle's lead-acid, AGM, or gel batteries with lithium-ion battery technology. We offer top-quality lithium deep cycle batteries for RVs, boats and mobile power systems.