POWERFUL CAPACITY: 16V 135Ah LiFePO4 battery delivers superior performance for marine electronics, offering 20% increased runtime compared to standard 12V batteries. LONG-LASTING DURABILITY: Features 4,000+ cycle life and 15-20 year design lifespan, with IP67 waterproof rating for complete protection against dust and water immersion. SMART CONNECTIVITY: Built-in Bluetooth enables real-time monitoring through Norsk Guardian App, with convenient one-touch power management for easy operation. VERSATILE INSTALLATION: Fits standard Group 31 dimensions (13 x 6.81 x 9.25 inches) and weighs approximately 37 lbs, making it a direct replacement for lead-acid batteries. ADVANCED SPECIFICATIONS: Supports 67.5A max charge current, 135A continuous discharge, and 270A pulse discharge, with operating temperature range from -20°C to 60°C for discharging. Experience superior marine power with Norsk Lithium's 16V 135AH LiFePO4 Deep Cycle Battery. This premium Group 31 battery delivers reliable 16V power for enhanced runtime and lower amperage draws compared to traditional 12V systems. Built tough for marine environments with IP67 waterproof protection, this battery features innovative Deep Sleep technology and Bluetooth connectivity through the Norsk Guardian App for comprehensive monitoring. The battery boasts impressive specs including a 135AH rated capacity, 17.75V max charge voltage, and robust discharge capabilities up to 270A pulse discharge. With 4,000+ cycles and a design lifespan of 15-20 years, it offers long-term reliability. The compact dimensions of 13 x 6.81 x 9.25 inches and 37 lbs weight make it a perfect replacement for traditional lead-acid batteries. The one-touch power management button provides easy access to state of charge and advanced features, while the Norsk Guardian App enables seamless control of features like Emergency Start Reserve and Deep Sleep mode.