https://www.epochbatteries.com/products/lithium-trolling-motor-battery-36v-100ah

Engineered to provide long-lasting consistent power output and many years of reliable maintenance-free service both on and off the water. Durable IP67 rated construction and internal heating ensure optimal performance in harsh environments. The on-board battery management system features a wide range of safety and performance enhancements along with Bluetooth connectivity. Pair any Epoch marine battery with the Epoch Batteries app (available via App Store & Google Play Store) to gain access to real-time monitoring, quick links to product manuals and more. All of our marine batteries utilize LiFePO4 chemistry for maximum stability, faster charging, reduced weight, constant voltage, increased cycle life, and maintenance-free usage.