The Norsk 16V 135AH Heated LiFePO4 Lithium Deep Cycle Battery is a top-tier power source engineered for rugged and extreme environments. Utilizing lithium iron phosphate (LiFePO4) technology, it offers exceptional energy efficiency, extended lifespan, and stable power output, making it perfect for high-demand uses like marine vessels, RVs, and off-grid setups. Featuring an innovative self-heating system, this lightweight battery thrives in cold climates, delivering reliable charging and discharging even in freezing conditions. With fast charging, zero maintenance, and a built-in BMS to safeguard against overcharging and temperature swings, it ensures dependable, eco-friendly power wherever you need it.Part # B16135GHDeep sleep feature using Norsk Guardian appThermal core heating technologyNorsk Guardian app integrationBMS protectionBattery Specifications:Type: Lithium Iron Phosphate (LiFePO4)Rated Voltage: 16VMax Continuous Current: 135ABCI Compliant Case: Group 31Dimensions:13 x 6.81 x 9.25 in.Weight: Approx. 44 lbs.Lifespan: 4000 + cycles, Est. 15-20 yearsManufacturer's 10-year warranty + 2 with Norsk GuardianQuantity per pack: 1