100Ah Lithium Battery (LiFePO4) 12.8V - Bluetooth - IP67 Waterproof - Heated Wider temperature range: -20°C~75°C. (Lower temperatures will result in decreased capacity) Lighter Weight: About 40%~ 50% less weight of comparable lead acid battery. Usable Capacity: Delivers twice power of lead acid batteries. Quality BMS: BMS (Battery Management System) will protect your battery from over charging, discharging too low or short circuits with built in cell balancing. Extraordinary cycle life: Offers 2000+ life cycles, up to5x longer than lead acid batteries, helping to minimize replacement cost and reduces total cost of ownership. Series and Parallel Configuration: Up to four batteries in series and eight batteries in parallel. Voltage: Uniform voltage during discharge. Bluetooth: Built in Bluetooth monitoring with the Amped Outdoors App.