Aolithium batteries are used in various applications such as RV, motorhome, fishing boats, off-grid systems, etc. All of them are rechargeable batteries and can reach 4000+ deep cycles at 90% DOD, with a service life of up to 10 years. We offer an 8-year warranty, you can buy with confidence. All LiFePO4 deep cycle batteries are in stock. Discount codes are recommended. New LiFePO4 batteries products are still under continuous development and we will provide you with more purchasing options.